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  • Question
  • In a bag, there are 8 red, 7 blue and 6 green flowers. One of the flower is picked up randomly. What is the probability that it is neither red nor green ? A) 13 B)821 C)621 D)2021


  • Options
  • A. Option A
  • B. Option B
  • C. Option C
  • D. Option D

  • Correct Answer
  • Option A 

    Explanation

    Total number of flowers = (8+7+6) = 21.

     

    Let E = event that the flower drawn is neither red nor green. 

    = event taht the flower drawn is blue. 

     

    --> n(E)= 7 

    --> P(E)=   7 21 = 1 3  

  • Tags: GATE, CAT, Bank Exams, Bank PO, Bank Clerk

    Permutation and Combination problems


    Search Results


    • 1. In how many ways can letter of the word RAILINGS arrange so that R and S always come together?

    • Options
    • A. 1260
    • B. 2520
    • C. 5040
    • D. 1080
    • Discuss
    • 2. The letters of the word PROMISE are to be arranged so that three vowels should not come together. Find the number of ways of arrangements?

    • Options
    • A. 4320
    • B. 4694
    • C. 4957
    • D. 4871
    • Discuss
    • 3. In how many different ways can the letters of the word 'HAPPYHOLI' be arranged?

    • Options
    • A. 89,972
    • B. 90,720
    • C. 72,000
    • D. 81,000
    • Discuss
    • 4. From a total of six men and four ladies a committee of three is to be formed. If Mrs. X is not willing to join the committee in which Mr. Y is a member, whereas Mr.Y is willing to join the committee only if Mrs Z is included, how many such committee are possible?

    • Options
    • A. 91
    • B. 104
    • C. 109
    • D. 98
    • Discuss
    • 5. A team of 8 students goes on an excursion, in two cars, of which one can seat 5 and the other only 4. In how many ways can they travel?

    • Options
    • A. 126
    • B. 120
    • C. 146
    • D. 156
    • Discuss
    • 6. In a group of 6 boys and 4 girls, four children are to be selected. In how many different ways can they be selected such that at least one boy should be there ?

    • Options
    • A. 205
    • B. 194
    • C. 209
    • D. 159
    • Discuss
    • 7. In how many different ways the letters of the word 'TRANSFORMER' can be arranged such that 'N' and 'S' always come together?

    • Options
    • A. 112420
    • B. 85120
    • C. 40320
    • D. 1209600
    • Discuss
    • 8. What is the value of 100P2 ?

    • Options
    • A. 10000
    • B. 9900
    • C. 8900
    • D. 7900
    • Discuss
    • 9. How many such pair of letters are there in the word ?TROUBLED? which have as many letters between them in the word as they have between them in the English alphabet?

    • Options
    • A. 2
    • B. 3
    • C. 4
    • D. 5
    • Discuss
    • 10. A,B,C,D,E,F,G and H are sitting around a circular table facing the centre but not necessarily in the same order. G sits third to the right of C. E is second to the right of G and 4th to the right of H. B is fourth to the right of C. D is not an immediate neighbour of E. A and C are immediate neighbours. Which of the following is/are correct ?

    • Options
    • A. F is third to the left of B
    • B. F is second to the right of B
    • C. B is an immediate neighbour of D
    • D. All of the above
    • Discuss


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