NCERT Miscellaneous Exercise Q4 - Probability

Question: Suppose that 90% of people are right-handed. What is the probability that at most 6 of a random sample of 10 people are right-handed?

Answer: Σ_{r=0}^{6} C(10,r) (0.9)^r (0.1)^{10−r}.

Full step-by-step NCERT solution with diagrams on Something by Zero.