Question

FOR A MEDAL

Answer 1

An integer is chosen at random from the first 40 positive integers. What is the probability that the integer chosen is divisible by 6 or 8?

Answer 2

0.6

Answer 3

what is that as a fraction

Answer 4

How did you get 0.6?

Answer 5

I got \[\frac{9}{40}\]

Answer 6

i ment 10/40 or 1/4

Answer 7

every 4th multiple of 6 should also be divible by 8

or (to think of it in a different way) every 3rd multiple of 8 should be divisible by 6.



6*4k = 2*4*3k = 8*3k => multiple of 8

8*3k = 4*2*3k = 6*4k => multiple of 6

Answer 8

I get 9 numbers not 10. \[\{6,8,12,16,18,24,30,32,36\}\]