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Q.

Two friends were born in the year 2000. What is the probability that they have the same birthday?


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a

1 366  

b

2 366  

c

1 133  

d

1 365   

answer is A.

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Detailed Solution

Given, two friends were born in the year 2000.
The probability of an event to be occurred is the division of the number of favourable outcomes by the total number of outcomes that is,
 Probability of an event =  Number of favourable outcomes   Total number of outcomes   
Find the number of ways that the two friends may have the same birthdays.
It is known that the year 2000 is a leap year.
So, the total number of days in the year 2000 is 366.
This means that the number of days in which the two friends have the same birthday is 366.
Thus, the number of ways that the two friends may have same birthdays is 366×366   .
Finding the required probability by dividing the total number of days by the number of ways that the two friends may have the same birthdays.
So, 366 366×366 = 1 366   The probability that two friends who were born in 2000 may have same birthdays is 1 366   .
Hence, the correct option is 1.
 
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