A bag contains 5 red balls, 6 yellow balls and 3 green balls. If two balls are picked at random, what is the probability that either btoh are red or both are green in colour

Directions (next five questions) : What will come in place of the question mark (?) in the following number series

Directions (next five questions) : What approximate value will come in place of the question mark (?) in the given questions ? (You are not expected to calculate the exact value.)