Question

In a survey conducted among the spectators of Indo- Australia match, 5% do not use twitter, facebook and instagram and 10% use all three. 20% use instagram and facebook, 25% use twitter and instagram, and 25% use both twitter and facebook. 55% use instagram, 50% use Facebook and 50% use Twitter.
The percentage of people who use facebook and twitter but not instagram

• A. 15%
• B. 5%
• C. 10%
• D. 25%

Answer 1

The correct option is A 15%

Given 10% of all people do not use any of the apps.
Also given 20% use instagram and facebook, 25% use twitter and instagram, and 25% use both twitter and facebook.
Now using the data 55% use instagram, 505 use Facebook and 50% use Twitter.
The percentage of people who use facebook and twitter but not instagram is 15%