2. Questions Bank
  3. 9th Class
  4. Mathematics
  5. Probability

9th Class Mathematics Probability Question Bank Probability

  • question_answer
    Two numbers are chosen from 1 to 5. Find the probability for the two numbers to be consecutive.

    A) \[\frac{1}{5}\]                                   

    B)        \[\frac{2}{5}\]                   

    C)         \[\frac{1}{10}\]                               

    D)        \[\frac{3}{5}\]

    Correct Answer: B

    Solution :

    \[E=1,2;3;3,4;4,5\] \[\Rightarrow \]\[n(E)=4\] \[n(S)={{\,}^{5}}{{C}_{2}}=10\] \[\therefore \]\[P(E)=\frac{n(E)}{n(S)}=\frac{4}{10}=\frac{2}{5}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner