I am currently in year 10 studying GCSE higher maths. My once issue with maths is probability. I have an exam tomorrow and am currently revising by going through past papers, I saw this question and wasn't sure how I'd solve it. Does anyone have an idea?
A school has 400 boys and 500 girls. The probability that a boy is vegetarian is 0.1 The probability that a girl is vegetarian is 0.2 Estimate the total number of vegetarians in the school.