Question

400 people are asked if they drink tea 7/10 say yes and 20% of the people who said yes at least drink 3 cups each day

Answer 1

520 is the answer to its Qn

Answer 2

Given:

(i) 400 people are present.

(ii) 7/10th of them drinks tea

(iii) 20% of the people who drink tea, drink atleast 3 cups each day.

To find:

(i) Number of people having atleast 3 cups each day.

Solution:

Given that, 7/10th of 400 people have tea.

So, number of people having tea = (7/10)*400

= 280

Again, 20% of the 280 people drink atleast 3 cups a day.

So, number of people doing so = (20/100)*280

= 280/5

= 56

56 people have atleast 3 cups of tea each day.