On random selection, the probability of getting a composite number amo

1.	On random selection, the probability of getting a composite number among the numbers from 51 to 100.A) 4/5B) 1/5C) 3/5D) 2/5
Answer» Correct option is: A) \(\frac{4}{5}\) Total number of outcomes = 100 - 51 + 1 = 50. Non - composite number from 51 to 100 are (53, 59, 61, 67, 71, 73, 79, 83, 89, 97). \(\therefore\) Number of non-composite number from 51 to 100 is 10. \(\therefore\) Number of composite number from 51 to 100 = 50 -10 = 40. \(\therefore\) Probability of getting a composite number from 51 to 100 = \(\frac {Number\, of \,composite\, number \,from \,51 \,to \,100}{Total \, number \, from \, 51 \,to \,100}\) = \(\frac {40}{50} = \frac 45\) Correct option is: A) \(\frac{4}{5}\)

On random selection, the probability of getting a composite number among the numbers from 51 to 100.A) 4/5B) 1/5C) 3/5D) 2/5

Answer»

Correct option is: A) \(\frac{4}{5}\)

Total number of outcomes = 100 - 51 + 1 = 50.

Non - composite number from 51 to 100 are (53, 59, 61, 67, 71, 73, 79, 83, 89, 97).

\(\therefore\) Number of non-composite number from 51 to 100 is 10.

\(\therefore\) Number of composite number from 51 to 100 = 50 -10 = 40.

\(\therefore\) Probability of getting a composite number from 51 to 100

= \(\frac {Number\, of \,composite\, number \,from \,51 \,to \,100}{Total \, number \, from \, 51 \,to \,100}\) = \(\frac {40}{50} = \frac 45\)

Correct option is: A) \(\frac{4}{5}\)

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