Home › CAT › Quantitative Aptitude › Modern Mathematics › Ignoring a leap year, the probability that two f…
Ignoring a leap year, the probability that two friends have different birthdays is:
A1/365
B365/364
C1/364
D364/365
Answer & Solution
Correct answer: D. 364/365
1. One friend's birthday can be any day.
2. The other must avoid that one day.
3. So 364 out of 365 days work.
_Source: NCERT Class 10 Mathematics, Chapter 15, Probability._
Related questions
Signals using exactly 4 flags out of those 5 different flags number:Signals using exactly 3 flags out of 5 different flags number:Three digit even numbers from the digits 1 to 6, with repetition allowed, number:The number of ways to arrange all 5 different flags on a staff is:The relation linking arrangements and selections of r objects from n is nPr equals:Permutations of n objects where p are alike and the rest all differ number:The number of permutations of n different objects taken r at a time, with no repetition, iThe value of 6 factorial is: