In a mixture of 35 litres, the ratio of milk and water is 4:1. If 7 litres of water is added to the mixture, the ratio of milk and water of the new mixture will be

Options

A. a. 2:1
B. b. 1:2
C. c. 4:5
D. d. 5:4

Answer

B

Explanation

Total boys take admission in school Q & S together
`=(10.5xx(64)/(100)+18xx(68)/(100))xx1000`
`=6720+12240=18960`
Total boys take admission in T
`=16xx(60)/(100)xx1000=9600`
Required percentage `=(18960-9600)/(9600)xx100`
`=(9360)/(9600)xx100=9600`
Required Percentage `=(18960-9600)/(9600)xx100`
`=(9360)/(9600)xx100=97.5%`