Sign in
Please select an account to continue using cracku.in
↓ →
In how many ways can the following prizes be given away to a class of 30 students, first and second in Mathematics, first and second in Physics, first in Chemistry and first in English?
1.) First and second in Mathematics:
There are 30 students eligible for the first prize and 29 students remaining for the second prize.
So, total number of ways of distributing the prize = $$30\times\ 29$$
2.) First and second in Physics:
There are 30 students eligible for the first prize and 29 students remaining for the second prize.
So, total number of ways of distributing the prize = $$30\times\ 29$$
3.) First in Chemistry:
There are 30 students eligible for the first prize.
So, total number of ways of distributing the prize = 30
4.) First in English:
There are 30 students eligible for the first prize.
So, total number of ways of distributing the prize = 30
So, total number of ways of giving all the prizes = $$\left(30\times\ 29\right)\times\ \left(30\times\ 29\right)\times\ 30\times\ 30=30^4\times\ 29^2$$.
So, correct answer is option D.
Create a FREE account and get:
CMAT Functions, Graphs and Statistics
CMAT Banking Computer Knowledge
CMAT Indian National Static GK
CMAT Economic and Social Issues
CMAT Probability, Combinatorics
CMAT Grammar and Sentence Correction
CMAT Data Interpretation Basics
CMAT Logarithms, Surds and Indices
CMAT Innovation and Entrepreneurship
Educational materials for CAT preparation