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?

Given,

⇒ Probability of 2 students not having same birthday = 0.992

∴ Probability of 2 students having same birthday = 1 – Probability of 2 students not having same birthday.

⇒ P(2 students having same birthday) = 1 – P(2 students having same birthday)

⇒ P(2 students having same birthday) = 1 – 0.992

⇒ P(2 students having same birthday) = 0.008

⇒ Probability that the 2 students have the same birthday is 0.008