Question

Cards numbered 1 through 30 are placed in a bag and shuffled. One card is chosen at random. What is the probability of randomly selecting a number less than or equal to 5, or a multiple of 7?

Answer 1

Well the probability would be

\[\large \frac{\text{What we want to happen}}{\text{Possible outcomes}}\]

So there are 30 cards...What is the probability of randomly selecting a number less than or equal to 5, or a multiple of 7?

So the possible cards that are LESS than or EQUAL to 5....would be 5,4,3,2 and 1 ...so 5 cards....also we would want a multiple of 7...what are the multiples of 7? well 7 , 14 , 21 and 28

So we have

1,2,3,4,5,7,14,21,28

That's 9 possible cards that we would want to choose....Out of a total of 30 cards...

so

\[\large \frac{9}{30}\]

Can that be simplified at all?

Answer 2

thanks!

Answer 3

No problem!

Answer 4

Not quite...looks like each number is divisible by 3 right?

Answer 5

I MEAN 3/10 @johnweldon1993

Answer 6

Yeah 3/10 is correct!