২৭৪৭৩
In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is -
উত্তর
21/46
২৭৪৭৫
একটি ভগ্নাংশের হর ও লবের অনুপাত ৩: ২। লব হতে ৬ বিয়োগ করলে যে ভগ্নাংশ পাওয়া যায় তা মূল ভগ্নাংশের ২৩। ভগ্নাংটির লব কত?
উত্তর
18
২৭৪৭৬
An airplane flies along the four sides of a square at the speeds of 200, 400, 600 and 800 km/hr. Find the average speed of the plane around the field.
উত্তর
384 km/hr
২৭৪৭৮
X can complete a certain work in the same time in which Y and Z together can do it. If X and Y together can finish it in 10 days and Z alone in 15 days , then Y alone can do it in?
উত্তর
20 days
২৭৪৮০
A and B start a business with initial investment in the ratio 12: 11 and their annual profits were in the ratio 4: 1. If A invested the money for 11 months B invested the money for-
উত্তর
3 months