An integer is chose between 70 and 100 fi d the probability that it is A) prime number B) divisibal by 7
Answers
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Answer:
Since integers is chosen between 100 and 70
Possible number to be chosen=71,72,73,...... 98,99
Therefore
Total Numbers=(100-70) -1
=30-1=29
a) prime number
Now, prime number between 70&100 are
71,73,79,83,89,97
Total prime number=6
Therefore,
Probability we have a prime number
= Total prime number
Total number
=6/29
b) divisible by 7
Now, number between 70&100 divisible by 7 are,
77,84,91,98.
Total number divisible by 7=4
Probability number divisible by 7
= Total number divisible by7
Total number
= 4/29