Month Collision

Probability Level 3

In my classroom, 40 students are sitting on 10 benches with 4 students on each. I am surprised to find that 5 of the 10 benches have at least two students who were born in the same month.

Is it likely that 5 or more of the benches would have this event?

Yes, this happens more than half the time No, this happens less than half the time.

Agnishom Chattopadhyay by Agnishom Chattopadhyay , 22, India

This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try refreshing the page, (b) enabling javascript if it is disabled on your browser and, finally, (c) loading the non-javascript version of this page . We're sorry about the hassle.

1 solution

Hint : 1 * 11/12 * 10/12 * 9/12 is more than 1/2

0 Helpful 0 Interesting 0 Brilliant 1 Confused

I can say 1+1 is 2, but does that prove anything? No. Explain your solution better, or don't post anything at all.

Alex Li - 3 years, 3 months ago

Log in to reply

Oh, so rude. It was a hint.

Juan Eduardo Ynsil Alfaro - 3 years, 3 months ago

1 * 11/12 * 10/12 * 9/12 is the probability that no two students in a single desk share a month. It is more than 1/2 but it doesn't solve the question.

Robert Szafarczyk - 3 years, 3 months ago

0 pending reports

×

Problem Loading...

Note Loading...

Set Loading...