Question

some extra question answers for chapter probability of class 9th maths

Answer 1

Hope this helps The probability of happening of an event is 38%. Then what is the probability of not happening of the event? 2. The record of a weather station shows that out of past 250 consecutive days, weather forecast were correct 175 times. i. What is the probability that it was not correct on a given day? ii. What is the probability that on a given day it was correct? 3. Two coins are tossed simultaneously 100times and we get the following outcomes. a) No head=30 b) One head=20 c) Two head=50 a) No head=30 b) One head=20 c) Two head=50 Find the probability of each event. 4. A recent survey found that the ages of workers in a factory are distributed as follows: If a person is selected at random find the probability that the person is a) 40 years or more Age in years 20-29 30-39 40-49 50-59 60 and above No. of workers 38 27 86 46 3