Question

1.Write down the phone numbers of 20 friends.
i. Find the probability of getting the number 0 in a phone
number from the list of phone numbers collected
ii. Find the probability of a digit repeating twice in the
same phone number from the list of phone numbers.




pla help answer fast​

Answer 1

Answer:

Step-by-step explanation:

Let 'S' be the sample space

S={2328245, 01125738457, 02223632235, 02225403226, 02222050348, 01724613656, 02225789416, 22103247 , 00222341387, 02512492474, 25713955, 04426241575, 02256773188, 02228227568, 02228073937, 03324237432, 02222041207, 01123986639, 01125540243}

n(S)=20

Let Event 'A' be the event where the number 0 is obtained in the phone number.

n(A)=16

P(A)=$\frac{n(A)}{n(S)}$=$\frac{16}{20}$=$\frac{4}{5}$

The probability of Event A is $\frac{4}{5}$

Let Event 'B' be the event where a digit repeats twice in the same number.

n(B)=20

P(A)=$\frac{n(A)}{n(S)}$=$\frac{20}{20}=\frac{1}{1}$

The probability of Event B is $\frac{1}{1}$.

Answer 2

Answer:

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Step-by-step explanation:

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