thankyouu so much, is it okay if you explain why for the 3rd one you 8&7?

hello,thankyouu so much :)) could you explain alittle ?

Since the probabilities of at least one of the members being above 40 have been found. We need to find the possibility of Both the members being 40 since the questions states “At Least One member being above 40” Suggesting that both members being 40 is a possible outcome , hence leading to ( 8/80 x 7/79 ) being needed.
Hope you understand. If you don't , just clarify with me again.

ohh I see, then for the second part is it members who are less than 40?

The second part is for the 1st member being less than 40 and 2nd member being above 40.
Part (c) is similar to part (b) , just need to add the 3rd part.

ohh okay,thankyouu so much once again

You’re welcome!