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How do I do this Maths question?

multiplexing-gamer

http://i.imgur.com/2GDWa.png
I will give rep

Reply 1

MissBrown

Alexander, what have you tried?

Reply 2

String.

EDIT: Show working/effort before I give the answer

Reply 3

multiplexing-gamer

Original post by String.

EDIT: Show working/effort before I give the answer

I did 0.16 (probability of rolling a six) over 510 = 127 over n ... But, it says its wrong :confused:

Reply 4

String.

Remember it's asking for a percentage, and an estimate at that.

Reply 5

DFranklin

I would "work backwards". Suppose n people out of 510 have lied to their boss. How many people would you expect to answer "Yes"?

So if 127 people answer yes, what would you expect n be?

Reply 6

Benniboi1

510/6=85

127-85= 42 people have lied.

42/510 x 100 = 8.235...%

=8.2%

(edited 12 years ago)

Reply 7

dbou

But remember that some of the people who rolled a six could also have lied to their boss.

Reply 8

DFranklin

Original post by Benniboi1

510/6=85

127-85= 42 people have lied.

42/510 x 100 = 8.235...%

=8.2%

Please read the Guide to Posting, and what it has to say about posting full solutions.

(I'm pretty sure your solution here is actually wrong, but the point still holds).

Reply 9

Benniboi1

Original post by DFranklin

Please read the Guide to Posting, and what it has to say about posting full solutions.

(I'm pretty sure your solution here is actually wrong, but the point still holds).