An urn contains 7 green and 5 yellow balls. Two balls are dr... | Mathematics | SolveeIt | Solveeit

Today, August 19

Question

An urn contains 7 green and 5 yellow balls. Two balls are drawn at a time. The probability that both balls are of the same colour is

A

$\frac {1} {33}$

B

$\frac {5} {33}$

C

$\frac {7} {22}$

D

$\frac {31} {66}$

Answer

$\frac {31} {66}$

Explanation

Solution

Answer (d) $\frac {31} {66}$