Question

find the probability that any of these boys chosen at random has blood group o​

Answer 1

Answer:

Total blood groups we have is 4 but there are plus one and minus so total 8.

Any of these boys.

let take 4 boys

P(E) = 4/8

P(E) = ½

similarly you can use as

one upon eight

three upon eight

eight upon eight

according to the numbers of boys.

........................That is all............