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 number of people who use instagram only is what percentage greater than the number of people who use twitter only is

• A. 50%
• B. 100%
• C. 25%
• D. 0.0

Answer 1

The correct option is B 100%

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.
So % of people who use instagram only is 20% and those who use twitter only is 10%.
$\frac{20-10}{10}\times 100=100\%$