Jac Board Class 11 Chemistry | Model Paper 3 | Question no. 21 to 30 | Complete Solution

Rajasthan board physics model paper 2022

Rajasthan board physics model paper 2022

Model test paper class 9

11th class English model paper solution

A question bank has questions of Physics and Chemistry. The number of questions of Chemistry are 3.5 times the number of questions of Physics. If there are 90 questions in the question , bank find the number of questions of Physics and Chemistry in the question bank .

In a class of 30 pupils, 12 Chemistry, 16 take Physics and 18 take History. If all the 30 students take at least one subject and no one take all three, then find the number of pupils taking 2 subjects.

A question paper consists of two sections having respectively, 3 and 5 questions. The followinng note is given on the paper "it is not necessory to attempt all the questions one questions from each section is compulsory". In how many ways can candidate select the questions?