Hello sir, Can you please explain this question
Rajiv is a student in a business school. After every test he calculates his cumulative average. QT and OB were his last two tests. 83 marks in QT increased his average by 2. 75 marks in OB further increased his average by 1. Reasoning is the next test, if he gets 51 in Reasoning, his average will be _____?
A few students decided to buy a gift for their teacher. So, each of them decided to contribute an equal amount for the gift. But when they went to buy the gift, they found that the price of it had increased by 16.66%. Now 2 more students joined to contribute and because of this the cost per head decreased by Re 1. If the contribution per head is an integer, which of the following cant be the initial number of students who had decided to contribute for the gift?
A. 5 B.6 C. 7 D.8