Question

In a class of 400 students, 10% participate in dance program, 8% participate in
English play, 4% in Hindi play, 20% in music program. How many of the
students do not take part in any activity?

Answer 1

Answer:

Let A and B represents the students play cricket and football respectively.

Let x be the percentage of students play neither cricket nor football.

Given:-

n(A∩B)=10

n(A)=50

n(B)=40

Now,

n(A)+n(B)+x−n(A∩B)=100

⇒50+40+x−10=100

⇒x=110−90=20

Hence 20% students play neither cricket not foot ball

Answer 2

Answer:

232

Step-by-step explanation:

10% of 400

= 10/100 × 400

= 40

8% of 400

= 8/100 × 400

= 32

4% of 400

= 4/100 × 400

= 16

20% of 400

= 20/100 × 400

= 80

40+32+16+80 = 168

400 - 168 = 232

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