Basic Probability Practise Session - Practice Questions & MCQ

Basic Probability Practise Session 1

Q1. Let a natural number 'n' is selected, then find the probability that 4th power of n' ends in digit 6 is ?

Q2. There are 10 red and 15 green balls. Find the probability, if:
       (i) if one ball is drawn and it is red.
      (ii) if two balls are drawn in succession then one is, red and other is green

Q3. If a letter is selected from the word OPPOSITION, find the probability, that:
       (i) a letter selected is a vowel?
      (ii) It the letters are rearranged in such a way that "no two O can occur together"?

Q4. There 6 boys and 6 girls. What is the probability that boys and girls sit alternately?

Basic Probability Practise Session 2

Q1. There are N letters and N envelops. Find the probability such that all the letters are not kept in their right envelope?

Q2. In a well-shuffled deck of cards, one card is picked. What is the probability that this card is neither a heart nor a king?

Q3. A die is rolled 4 times. Out of 4 faces obtained, the probability that the minimum face value is not less than 2 and the maximum face value is not greater than 5?

Q4. Two dices are rolled simultaneously. Find the probability such that the sum of the digits on faces is greater than 7?

Q5. Three dices are rolled simultaneously, Find the probability such that the sum of faces on the digits is greater than 13.

Basic Probability Practise Session 3

Q1. There are 21 tickets in a box numbered 1 to 21. If three tickets are picked randomly. Find the probability that the tickets picked are in AP?

Q2. There are 3 oranges and 4 apples randomly placed in a line. Find the probability of the extreme fruits being both oranges?

Q3. What is the probability that out of the group of N people, at least two of them will have the same birthday? (Given that N<365 and the year is non-leap).