There are 15 balls in a box 8 balls are green 4 are blue and 3 are white. Then 1 green and 1 blue balls are taken from the box and put away. what is the probability that a blue ball is selected at random from the box?

A short distance athlete has taken 60 seconds to cover 100 meters . If he makes 30 steps in 9 seconds , how ma...

Three angles of a triangle are in proportion 5 : 6 : 7. Then what is the difference in degrees between the big...

If the length of each of the sides of three square garden's plots is increased by 50 percent, by what percent...

A manufacturer sells three products i.e A, B and C . Product A costs 200 and sells for 250, Product B costs 15...

A farmer has two rectangular fields. The larger field has twice the length and four times the width of the sma...

If a, b and c are 3 consecutive integers and a>b>c, Which of the follwoing has the maximum value?