Answer:

Step-by-step explanation:
Independent events:
If two events, A and B are independent, the probability of both A and B happening is the same as the probability of A happening multiplied by the probability of B happenings, that is:

In this question:
The statement is 
Answer:
24
Step-by-step explanation:
you would multiply 12 time 2
Lcm of 60 and n = 420
Stated: n <90 and a multiple of 6
420/60 = 7 thus n must be a multiple of 7
Therefore n =42 or 84
Answer: the answer is 8
Step-by-step explanation:
Hope this helped.
Answer:
hello
we can think like the hamburger is all equal to 100.
if the first bite was %20 of the hamburger, we can say there left 80. because 100×20/100 its = 20 and 100-20= 80. the problem is not this i wanna say. there was a teory similar like this problem.
a girl was going to her home. in every step she was going 2/1 of the road.. it was impossible to arrive to home.
we said 100 for all hamburger right?
it would be 0,0000000100 too..
so if we continued to dividing by %20 everytime, we never had a result of it.
maybe at least we found 0,0000000000001.
And? then we had to found 0,0000000000001's %20.
soo, the problem's answer is its not possible.
good luck(: (sry for nub eng)