Question

at school has 320 girls and 250 boys. the probability that a girl is left-handed is 0.2 the probability that a boy is left-handed is 0.1 estimate the number of left-handed students in the school.

Answer 1

Explanation:

E(lh girls)
`=0.2* 320=64`

E(lh boys)
`=0.1 * 250 =25`

Estimated total left handed students
`=64+25=89`