Question

An urn contain 25 balls numbered 1 to 25 suppose an odd number is considered a success and 2 balls are drawn from the urn with replacement then find the probability of getting two successes

Answer 1

Answer: The probability of getting two successes is 169/625.

Step-by-step explanation:

First find how many odd numbered balls are there.

So, there are 13 odd numbered balls.

Formula of probability= number of success/number of total event

There are two balls drawn.

The probability for the first ball drawn and marked with odd number is given by

P(odd1)= 13/25

Now, the probability for the second ball drawn and marked with odd number taking into account that replacement is allowed is given by

P(odd2)= 13/25

So, the probability of getting two balls marked with odd number would be the product of probability of first ball drawn and the probability of second ball drawn.

Therefore, the probability of getting two successes= 13/25*13/25= 169/625

Answer 2

Answer:

Step-by-step explanation:

From total 25 balls there will be 13 even and 12 odd balls.

And in the urn it will contains all 25 balls from the urn we have to select the odd ones

The p(A)= 13/25

And for the second one

P(B)=13/25

The probability for second is also same because we are doing with replacement means 1 is taken out and we have to put the first one in urn again and then we can take the second one.

The required probability is

13/15*13/25=169/625