Rohit scored an average mark of 55 in five subjects. English, Hindi, Maths, Science and Social Science. If he scored 45, 43, 58 and 44 in English, Hindi, Maths and Science respectively, what was his score in Social Science?

What is the combined ratio of 3:2, 7:4 and 6:5?

In a mixture of $165$ litres, the ratio of liquids $X$ and $Y$ is $6:5$. If $5$ litres of liquid $Y$ is added in the mixture, then what is the ratio of $X$ and $Y$ in the new mixture ?

If we divide 184 kg in the ratio 2 : 3 : 3, the relevant measures in kg are:

(A) 26, 79 and 79 

(B) 6, 89 and 89 

(C) 46, 79 and 79 

(D) 46, 69 and 69 

What is the $4th$ proportional of $3, 8, 12$ ? 

1. $36$

2. $26$

3. $32$

4. $16$

A box contains one rupee, fifty paisa and twenty five paisa coins. The total number of coins are $378$. The ratio of values of the above coins is $13:11:7$. The number of twenty five paise coins was:

In water, The ratio of the mass of hydrogen to the mass of oxygen is always _____.