Exams

If 3x + 5y + 7z = 49 and 9x + 8y + 21z = 126, then what is the value of y?

A machine depreciates in value each year at the rate of 10% of its previous value. However, every second year there is some maintenance work so that in that particular year, depreciation is only 5% of its previous value. If at the end of the fourth year, the value of the machine stands at Rs 1,46,205, then find the value of machine at the start of the first year.

The mean of 20 observations is 19. One more observation is included and the new mean becomes 20. The 21st observation is

In the following question, out of the given four alternatives, select the one which best expresses the meaning of the given word.

Propitious

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

In the same boat

If x -­ y = 7 and xy = 32, then value of (x2 + y2) is

25% discount is offered on an item. By applying a promo code the customer wins 22% cash back. What is the effective discount?

In the following question, out of the four alternatives, select the alternative which is the best substitute of the words/sentence.

Working-class people regarded collectively