Salam's average in four test is 80%. What mark does she need to score in her fifth test to make her average 84%?

100%

94%

84%

96%

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উত্তর: 100%

the sum of the first 4 test scores is 4*80 = 320. the sum of ALL 5 scores to be 5*84 = 420. ∴she need score in her fifth test = 420 - 320 = 100. (ans)

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Salam's average in four test is 80%. What mark does she need to score in her fifth test to make her average 84%?

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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 -

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

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?