Probability 2 Question 10
10. Three numbers are chosen at random without replacement from . The probability that the minimum of the chosen number is 3 , or their maximum is 7 , is … .
(1997C, 2M)
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Answer:
Correct Answer: 10.
Solution:
- Let
be the event getting minimum number 3 and be the event getting maximum number 7 .
Then,
from numbers 4 to 10)
numbers 1 to 6 )
and