Question
A Consignment of 12 mobile phones contains 4 defectives. The mobile phones are selected at random one by one and examined. The ones examined are not put back. What is the probability that seventh one examined is the last defective?
More Permutation and combination Questions
- Find the number of ways to arrange each letter of the word 'PROFESSION' such that all the vowels always come together.
- 30 junior and 38 senior participants participate in a tournament. Each pair of juniors plays one match, and each pair of seniors plays one match. Number of...
- How many four-letter words without repetition having exactly two vowels can be formed by using the letters of the word "CAMPFIRE"?
- Using all the letters of the word CANOER, how many words start with a vowel but end with a consonant?
- How many four-letter words without repetition having exactly two vowels can be formed by using the letters of the word "RECLAIM"?
- Geography books are never together.
- Six students are to be seated in a row. Four of them are boys and the rest are girls. In how many ways can they be arranged such that the two girls do not ...
- How many four-letter words without repetition having exactly two vowels can be formed by using the letters of the word "MEASURE"?
- You have 4 distinct cubes and 2 distinct balls. Find the number of ways to arrange them such that all 4 cubes are not placed together.
- Seven books out of which 4 are novels and rest are comics have to be arranged on a shelf. Find the number of ways of arrangement in which all four novels a...
Relevant for Exams:
Hey! Ask a query
Please enter email id
The email must be a valid email address.
Please enter Mobile Number
Please enter valid Mobile Number
Please enter your Doubt
Think You're Ready for RBI Grade B?
RBI Grade B 2026 Phase 1 Memory Based Paper
- 200 Questions with Detailed Solutions
- Section-wise Coverage (GA, English, Quant & Reasoning)