Question 16550 – TIFR PHD 2022
December 9, 2023Question 1930 – Nielit STA 17-12-2017
December 9, 2023Question 14013 – NIC-NIELIT Scientist-B 2020
In a group of 24 members, each member drinks either tea or coffee or both. If 15 of them drink tea and 18 drink coffee, find the probability that a person selected from the group drinks both tea and coffee.
Correct Answer: B
Question 31 Explanation:
n(μ)=24
n(T)=15
n(C)=18
n(T U C) = n(T) + n(C) – n(T ∩ C)
24 = 15+18-n(T∩C)
n(T∩C)=33-24
=9
n(T ∩ C) / n(μ) = 9/24
=3/8
n(T)=15
n(C)=18
n(T U C) = n(T) + n(C) – n(T ∩ C)
24 = 15+18-n(T∩C)
n(T∩C)=33-24
=9
n(T ∩ C) / n(μ) = 9/24
=3/8
1/8
3/8
5/24
None of the options