Which of the following unit operations reduce the microbial load

How many students from Institute R got placement?

I. The number of students studying in Institute Q and R are in the ratio of 5:7.

How many boys are there in the class?

I. The number of girls is 30% of the number of boys.

II. The ratio of the number of boys to that of girls is 3:5.

What is the profit%/loss% incurred by selling an article for Rs. 44,000?

Rohit, Dhawan, Virat, Dhoni and Mayank are five friends. Their mean age is 28. What is the age of Virat?

Statement I : Rohit’s age is 28

What is the value of (4ab+ab²)/(a² b),   a,b ≠0

I. a + b = 0

II. a – b = 1

What was the total compound interest on a sum after three years?

What is the average of L, 50, 76, 82, M and N?

I. L is six more than M.

II. N is four less than L.

Ramu gained how much by selling his product in June 2017?

I. He earned 40% more profit in July 2017 as compared to May 2017.

The cost price of an article is Rs. 600. How much profit did a trader get by selling the article, if it was sold at 15% discount?

What is the speed of the stream?

I. The boat covers a distance of 54 km in 3 hours while running downstream.