The average of 10 numbers is 7. What will be the new av average if each of the numbers is multiplied by 8?

১

If u> t, r> q , s>t, t>r, which of the following must be true?

I only

II only

III only

II and III only

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

II and III only

সমাধান

u>t, t>r, r>q so, u> t>r>q s>t, t>r, r>q so, s>t>r>q

২

The price of a certain television set is discounted by 10 percent, and the reduced price is then discounted by 10 percent. The series of successive discount is equivalent to a single discount of -

20%

19%

18%

11%

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

19%

৩

A pen was sold at 15% loss. If the selling price was Tk. 8 more, than the seller could have made a profit of 10%. What was the purchase price of pen?

None of them

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

সমাধান

Let, Purchase price = Tk.x At 15% loss SP = Tk.(17x/20) At 10% profit SP = Tk.(11x/10) As per question , (17x/20) + 8 = (11x/10) Or, 5x = 160 Or, x = 32 Therefore, the required value = Tk.32

৪

Ms. Lyla wants to put up fencing around three sides of her rectangular garden and have a side of 20 meter unfenced. If the yard has an area of 680 square meters, how many yards of fencing does she need?

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

সমাধান

Length of the garden = 680/20 = 34 meter Total length of the three sides = 2×34 + 20 = 68 + 20 = 88 meter

৫

The difference between two numbers is 7 and their product is 60, then one of the two numbers must be -

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

সমাধান

x - y = 7; x = (y + 7) xy = 60 or , (y + 7).y = 60 or, y² + 7y - 60 = 0 or, (y + 12) (y – 5) = 0 So, Y = - 12,5 So, the two number is 12 and 5

৬

If the diameter of a circle is doubled the area will be -

4 Times

3 Times

2 Times

No increase

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

4 Times

সমাধান

Area of a circle is propotional to the square of the diameter. So, if the diameter of a square is doubled, its area will be quadrupled or 4 times.

৭

In a sugar-water solution, the ratio of water to sugar is 8:3. If you add 2 Kgs of sugar, the ratio become 2:1. What was the amount of sugar in the original solution?

4.5

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

সমাধান

W : S = 8 : 3 W/S = 8/3 3W = 8S Again, W/(s + 2) = 2/1 1W = 2s + 4 3W = 6S + 12 8S = 6S + 12 S = 6

৮

If the area of rectangle R with length 4 feet is equal to the area of square S, which has a perimeter of 24 feet , then the perimeter of rectangle R equals -

9 Feet

16 Feet

24 Feet

26 Feet

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

26 Feet

সমাধান

Side of the square S = 24/4 = 6 Area of the rectangle R = Area of the square S = 62 = 36 So, length of the rectangle R = 36 / 4 = 9 Therefore, perimeter of the rectangle R = 2(9 + 4) = 26 feet

৯

What percent of 25 is 0.20?

0.8

0.08

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

0.8

সমাধান

let x% of 25 is 0.2 so, (x/100) × 25 = 0.2 so, x = 0.8

১০

If N and P are both odd numbers, which of the following numbers must be an even number?

N+P

NP+2

N+P+1

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

বিস্তারিত

উত্তর

N+P

অনুসন্ধান করুন

বিস্তারিত সমাধান

The average of 10 numbers is 7. What will be the new av average if each of the numbers is multiplied by 8?

If u> t, r> q , s>t, t>r, which of the following must be true?

The price of a certain television set is discounted by 10 percent, and the reduced price is then discounted by 10 percent. The series of successive discount is equivalent to a single discount of -

A pen was sold at 15% loss. If the selling price was Tk. 8 more, than the seller could have made a profit of 10%. What was the purchase price of pen?

Ms. Lyla wants to put up fencing around three sides of her rectangular garden and have a side of 20 meter unfenced. If the yard has an area of 680 square meters, how many yards of fencing does she need?

The difference between two numbers is 7 and their product is 60, then one of the two numbers must be -

If the diameter of a circle is doubled the area will be -

In a sugar-water solution, the ratio of water to sugar is 8:3. If you add 2 Kgs of sugar, the ratio become 2:1. What was the amount of sugar in the original solution?

If the area of rectangle R with length 4 feet is equal to the area of square S, which has a perimeter of 24 feet , then the perimeter of rectangle R equals -

What percent of 25 is 0.20?

If N and P are both odd numbers, which of the following numbers must be an even number?

কোর্স

অনুসন্ধান করুন

বিস্তারিত সমাধান

The average of 10 numbers is 7. What will be the new av average if each of the numbers is multiplied by 8?

সম্পর্কিত বিষয় সমূহ

সম্পর্কিত অন্যান্য প্রশ্ন

If u> t, r> q , s>t, t>r, which of the following must be true?

The price of a certain television set is discounted by 10 percent, and the reduced price is then discounted by 10 percent. The series of successive discount is equivalent to a single discount of -

A pen was sold at 15% loss. If the selling price was Tk. 8 more, than the seller could have made a profit of 10%. What was the purchase price of pen?

Ms. Lyla wants to put up fencing around three sides of her rectangular garden and have a side of 20 meter unfenced. If the yard has an area of 680 square meters, how many yards of fencing does she need?

The difference between two numbers is 7 and their product is 60, then one of the two numbers must be -

If the diameter of a circle is doubled the area will be -

In a sugar-water solution, the ratio of water to sugar is 8:3. If you add 2 Kgs of sugar, the ratio become 2:1. What was the amount of sugar in the original solution?

If the area of rectangle R with length 4 feet is equal to the area of square S, which has a perimeter of 24 feet , then the perimeter of rectangle R equals -

What percent of 25 is 0.20?

If N and P are both odd numbers, which of the following numbers must be an even number?