Mathematics
NULL
Medium
Question
Out of 10 persons working on a project, 4 are graduates. If 3 are selected, what is the probability that there is at least one graduate among them?
A
1/2
B
2/3
C
3/4
D
5/6
✓ Official correct answer
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A
1/2
No member explanations yet for this option.
B
2/3
No member explanations yet for this option.
C
3/4
No member explanations yet for this option.
D
5/6
No member explanations yet for this option.
Explanation
P(at least one graduate) = 1 − C(6,3)/C(10,3) = 1 − 20/120 = 5/6.