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Kelly asked ...

Question

Kelly asked $120$ students questions about skiing. The results of the poll are shown in the table below.
After completing the poll, Kelly wondered how many of the students polled had skied both cross-country and downhill. How many of the students polled indicated that they had skied both cross-country and downhill?

A

73

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B

65

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C

47

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D

18

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E

8

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Solution

The correct option is A $8$
No. of students skied (yes) $= 65$
No. of students skied (downhill) $= 28$
No. of students doesn't skied cross country $= 20$
so, number of students skied both $=$ No. of students skied downhill - No. of students who doesn't skied cross country
No. of students skied both $= 28 - 20 = 8$

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