What is the product of (x + a) and (x + b)?

45 people can repair a road in 10 days, working 6 hours a day. In how many days can 30 people, working 6 hours a day, complete the same work?

A school has 45% girls. If 80% of girls score more than 75% marks and 70% of the boys have score more than 75% marks. If a student is selected at random and is found to have more than 75% marks, find the probability of it being a boy.

In a proportion, the 1^st , 2^nd and 4^th  terms are 51, 68 and 108, respectively. What is the 3^rd term?

The curved surface area of a right cylinder is 3696 cm². Its height is three times its radius. What is the capacity (in litres) of the cylinder? (Take π =22/7)

In the given question, two equations numbered l and II are given. Solve both the equations and mark the appropriate answer.

I. x² - 5x + 6 = 0

II. 2y² - 32y + 126 = 0

In the given question, two equations numbered l and II are given. Solve both the equations and mark the appropriate answer.

I. x²+ 2x – 15 = 0

II. y²+ 16y + 55 = 0

The average of 10 numbers is 14. If each number is multiplied by 6 then what will be the new average?