Two finals are scheduled – The Wimbledon match and the World Cup Cricket at…
2025
Two finals are scheduled – The Wimbledon match and the World Cup Cricket at the same time. Anu wants to watch the Wimbledon finals and her brother Vinu wants to watch WCC final. They decide to roll a tetrahedral die twice. The tetrahedral is numbered 1,2,3,4 on its four sides and all numbers are equally likely to appear. Anu rolls first and then Vinu rolls. If the number on the first roll is strictly greater than the number on the second roll. Anu wins and gets to watch Wimbledon. What is the probability that Anu will get to watch Wimbledon?
- A.
3/8
- B.
5/9
- C.
1/4
- D.
2/5
Attempted by 413 students.
Show answer & explanation
Correct answer: A
Probability of any number appearing = 1/4Anu wins in the following condition If 1 occurs on the first roll then there is no chance of her winning because in the next roll the number appearing will be either 1 or greater than 1 If 2 appears on 1st roll then Anu will win if 1 appears on the second roll If 3 appears on the 1st roll then Anu will win if 1 or 2 appears on the second roll If 4 appears on the first roll then Anu will win if 1, 2, 3 appears on the second rollTherefore, the probability of Anu winning
