Question

The school has 800 students with 20 students on the gymnastic team and 10 students on the chess team (including 3 students who are on both teams). How many students in the school are not members of either the gymnastic team or the chess team?


{767}

{770}

{773}

{776}

Answer 1

So we have the number 800, 20 and 10.

BUT there are three students who are in the same teams, meaning, we can't count these students twice

So we have to subtract 3 from either 10 or 20

Let's chose 20

20 - 3 = 17

So:

17 + 10 = 27

800 - 27 = 773

Answer 2

thank you so very much

Answer 3

yw :)