196k views
3 votes
(04.02 MC)

Researchers claim that 10% of people are left handed. Suppose the researchers' claim is true. Mr. Thomas has an Algebra class with
25 students. What is the probability that exactly 4 of them are left handed?
0
0.1384
0.1023
0.0729
0.9020

User Hakank
by
8.4k points

1 Answer

4 votes

Answer:

0.1384

Explanation:

Using binomial probability:

P = nCr p^r q^(n-r)

where n is the number of trials,

r is the number of successes,

p is the probability of success,

and q is the probability of failure (1-p).

Given n = 25, r = 4, p = 0.10, and q = 0.90:

P = ₂₅C₄ (0.10)⁴ (0.90)²⁵⁻⁴

P = 12650 (0.10)⁴ (0.90)²¹

P = 0.1384

User Maytham Fahmi
by
8.1k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories