Question
A number is chosen at random from the set £1,2,3,4......18...24....30 find the probability that it is( A) either a factor of 18 or a multiply of 6( b) either a multiple of 5 or a factorof 2( c) nither a factor of 8 nor 12
Answers
Catherine
Please am waiting for the answer to the questions I need it please
oobleck
this just like the COMPUTER problem.
You apparently have 30 numbers to choose from.
So count the ways to pick a desired number, and divide that by 24 to get the probability of picking one of the desired choices.
(sometimes it might be easier -- as in (c) -- to count the ways to fail, and then just subtract that from 24 to get the ones you want)
You apparently have 30 numbers to choose from.
So count the ways to pick a desired number, and divide that by 24 to get the probability of picking one of the desired choices.
(sometimes it might be easier -- as in (c) -- to count the ways to fail, and then just subtract that from 24 to get the ones you want)
Catherine
Please help me show working thanks
oobleck
come on ... For the first one,
factors of 18: 1,2,3,6,9,18
multiples of 6: 6,12,18
total choices: 7
so P = 7/24
I'm sure you can follow these steps on the others.
factors of 18: 1,2,3,6,9,18
multiples of 6: 6,12,18
total choices: 7
so P = 7/24
I'm sure you can follow these steps on the others.