Posted in Challenge Prelims V1.0, CSAT - Permutations and Combinations

Challenge Prelims V1.0 – Day 59 – CSAT Paper

 March 24, 2024  Leave a comment
Challenge Prelims V1.0-09

Subject: CSAT

Topics: Permutations and Combinations

Instructions:
This section is designed to help you prepare for the upcoming Prelims Exam. Here are some details about the quiz:

– The quiz consists of 5 practice questions based on specified topics.
– Each question carries 2.5 marks.
– There is no negative marking for incorrect answers.
– This quiz is purely for practice purposes.

Your participation in this quiz can significantly boost your score in the Prelims Exam.

Best of luck! Let’s get started.

1. In how many ways can a batsman score exactly 25 runs by scoring single runs, fours and sixes only, irrespective of the sequence of scoring shots? (UPSC 2023)

 
 
 
 

2. Using 1, 1, 2, 2, 3, 3 as digits, how many numbers greater than 300000 can be formed?

 

 
 
 
 

3. How many 3 digit numbers are there such that it has at least one 0 as a digit?

 
 
 
 

4. There 5 black balls, 10 white balls, 8 red balls in a box. Ajay started taking balls one by one from the box without looking and without replacement. If he wanted to get one red and one black ball to play with, then what is the maximum number of attempts he has to make?

 
 
 
 

5. The letters of the word ‘TEARS’ needs to be arranged in such a way that vowels will always come together. How many such arrangements are there?

 
 
 
 

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