9th mathematics exercise question with answer, Mathematics

Statistics – Exercise 1.5.5 – Class IX


  1. Two unbiased 6 – faced die are thrown. What is the total number out comes?


total number of outcomes = 6 × 6 = 36

  1. A die has the faces numbered 2, 4, 6, 8, 10 and 12. It is thrown once. What is the probability that an even numbered face shows up?


Probability that even number farm shows up = 6/6 = 1

  1. In a pack of 52 playing cards, a card was selected at random. What is the probability that the card selected was both red and black?


Zero: A card cannot be both red and black.

  1. Weather forecast made for 30 days in a month was recorded and found that it was correct for 21 days. What is the probability that on a randomly selected day, the forecast is (i) Correct and (ii) Not correct?


Probability of correct forecast = 21/30 = 7/10

Probability of correct forecast= 9/30 = 3/10