Keith asked 30 people whether they knew how to play whist or dominoes. Fifteen of them knoew how to play whist and 20 knew how t

Question

4 years ago

15

Keith asked 30 people whether they knew how to play whist or dominoes. Fifteen of them knoew how to play whist and 20 knew how t

o play dominoes. Five people did not know how to play either game. Create a Venn diagram to determine how many knew how to play both games.

Mathematics

1 answer:

adelina 88 [10] · Answer 1 · 2021-11-26T08:20:35+03:00

adelina 88 [10]4 years ago

7 0

Ok so, 15 of them know how to play whist (I have no idea what that is) and 20 of them know how to play dominoes, 5 of them do not. So, if you add up 20+15=35, take off 10 35-10=25 so it must mean that 10 is the answer. (Also if you add 5 to that 25+5=30)
The Answer is 10