An experiment involves selecting a numbered chip, some black and some white, from a bag of chips. The probability of selecting a black chip with an odd number is 2/5. The probability of selecting a black chip is 1/4. What is the probability of selecting a chip with an odd number given that the chip is black?
Given above:
P(A and B) -> P(odd and black) =
P(A) -> P(black)=

please help !!