Probability ncert solutions Chapter 15 Exercise 15.1 Question 7
7. It is given that in a group of 3 students, the probability of 2 students not having the same birthday is 0.992. What is the probability that the 2 students have the same birthday?
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Probability ncert solutions Chapter 15 Exercise 15.1 Question 7
7. It is given that in a group of 3 students, the probability of 2 students not having the same birthday is 0.992. What is the probability that the 2 students have the same birthday?
Probability ncert solutions Chapter 15 Exercise 15.1 Question 6
6. A bag contains lemon flavored candies only. Malini takes out one candy without looking into the bag. What is the probability that she takes out
(i) an orange flavored candy
(ii) a lemon flavored candy
Solution:
(i) There are no orange flavored candies in the bag. Therefore, the probability of taking out orange flavored candy is zero.
(ii) All the candies present in the bag are lemon flavored. Therefore, Malini takes out lemon flavored candy for sure which means probability of taking out lemon flavored candy is 1.
Probability ncert solutions Chapter 15 Exercise 15.1 Question 5
5. If P(E)=0.05, what is the probability of ‘not E’?
Solution:
We know that P(E) + P(not E)=1
0.05+P(not E)=1
P(not E)=1-0.05=0.95
Probability ncert solutions Chapter 15 Exercise 15.1 Question 4
4. Which of the following cannot be the probability of an event?
(A) 2/3 (B) -1.5 (C) 15 % (D) 0.7
Answer is (B) because probability of happening any event is always greater than or equal to 0 and less than equal to 1.
Probability ncert solutions Chapter 15 Exercise 15.1 Question 3
3. Why is tossing a coin considered to be a fair way of deciding which team should get the ball at the beginning of a football game?
Answer:
It is because there are equal chances of winning a toss for both of the teams. The probability of winning a toss for a particular team is 50 % or 0.5.