Question

There are 3 woolen bags each containing 5 white balls and 2blacks balls. Also there are 2 cotton bags each containing 1 white and 4 black balls. A black balls is drawn from one of the bags.The probability that the black ball came from the woolen bags is

Answer 1

total no. of balls in woolen bag is 21
no.of black balls in woolen is 6
probability of back balls from woolen bag is 6/21
3/7
MARK AS BRAINLIEST PLZZ