doubt in AQ1.7, question 5

[mridvika sharma]

Respected Sir/Ma'am

Please explain me question 5 of AQ1.7 . as in this question the correct answer is 50 but according to me it should be data insufficient ,because in the question it is not given that how many clients use both radio and television ,therefore  how can we find the number of clients who use only radio.

Regards

[sandip biswas]

so there are 3 groups of people in this 200 figure:

1. People who only use Television(a)

2. People who only use Radio(b)

3. People who use both Television and Radio(c)

So, a + b + c = 200

again People who use television are sum of group 1 and 3

so, a + c = 150

Clearly b = 200 - 150 = 50

People who only use Radio(group 2) = b = 50

Hope this clears things up for you

[Mathematics 1 Support 2]

Hi,

Use the Venn diagram to solve this question. There are 150 who use television (which involve who only use television + who use television and radio both). so there will be 50 who use only radio.

Best wishes,

Rahul