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
- Among a set of 4 black balls and 3 white balls, how many selections of 3 balls can be made such that at least 2 of them are black balls?
- In how many ways can 2 girls and 8 boys be seated in a row so that girls are always together?
- Find total number of ways in which the word “COMMISSION” can be arranged.
- Using all the letters of the word IMPACT, how many words start with a vowel but end with a consonant?
- How many numbers of five digits may be formed with the digits 7, 2, 0, 0, and 1?
- Count the number of “words” from MISSISSIPPI when all the vowels occur together.
- How many different 10-letter words (with or without meaning) can be formed using all the letters of the word "TEMPTATION"?
- Geography books are never together.
- An examinee is required to answer the eight questions out of 16 questions which are divided into two groups each containing eight questions each and he is ...
- From 6 officers and 8 Jawans, in how many ways can 5 be chosen to include exactly 3 officers?
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)