## RS Aggarwal Solutions Class 9 Chapter 15 Probability

**Exercise 15A**

**Question 1:**

**Question 2:**

https://www.youtube.com/watch?v=5SwdIrhmCoE

**Question 3:**

**Question 4:**

**Question 5:**

**Question 6:**

Number of tests in which he gets more than 60% marks =2

Total numbers of tests =6

∴ Required probability

**Question 7:**

**Question 8:**

**Question 9:**

**Question 10:**

Total numbers of students =30

Numbers of students who lie in the interval21-30=6

∴ Required probability

**Question 11:**

Bhavik Rathod says

a coin tossed three times find the probability to come tail more than head

Aryan raj says

TotalNo. Of events -8 (TTT,HTT,THT,HHT,TTH,HTH,THH,HHH) possible no. of events-4(TTT,HTT,THAT,TTH ) p- 4/8-1/2