There are 30 boys and 40 girls in a class. If the average age of boys is 10 yrs and average age of girls is 8 yr, then the average age of the whole class is:

The Least Common Multiple (L.C.M) of 0.12, 9.60, 0.60 is:

A person spends \(\frac{1}{3}\) part of his income on food, \(\frac{1}{4}\) part on house rent and remaining Rs. 630 on other items. The house rent is:

Value of "A" in the expression, 5 + 12 × 10 ÷ 120 = A × 10, is:

A person covers a certain distance by car at a speed of 30 km/h and comes back at a speed of 40 km/h. The average speed during the travel is:

An unknown man is found murdered. The corpse has one gold plated tooth, right ear is pierced and a healed fracture of left hand thumb. A man with these characteristics is reported missing. What are the chances (probability) of the corpse being the missing man? (given the occurren…

An employer reduces the number of employees in the ratio 8:5 and increases their wages in the ratio 7:9. Therefore, the overall wages bill is:

Father is 3 years older than the mother and the mother's age is now twice the daughter's age. If the daughter is 20 years old now, then the father's age when the daughter was born is:

If 80% of A = 20% of B and B = 5x% of A, then the value of x is: