Question

A new prototype of sunglasses are designed to help people with colour blindness see with better contrast when driving. In a focus group, 10 rectangular-shaped and 10 oval-shaped sunglasses are provided to participants. There happen to be 10 men and 10 women. What is the probability that the shape of sunglasses and sex of participant are perfectly balanced if glasses were randomly distributed?

Answer 1

Basically there should be 5 in each categories

men-rectangular shaped, men- oval , women - rectangular shaped,, women-oval shape

Number of ways