Question

When tossing 2 coins, P(at least 1 head) = 1 - P(not all tails).

A. True
B. False

Answer 1

true

Answer 2

so I toss two coins - very well.
What are the possible outcomes - think think ;)

Answer 3

I think it's not true, that is false
P(at least 1 head) = 1 - P(all tails).
Since other then all tails, all other outcomes satisfy the condition. So, you'll get the above expression

Answer 4

lol sorry typo - i am hallucinating -_-


"not all tails" --> same as "atleast one head"

Answer 5

so is it true or false?

Answer 6

possible outcomes -->HH, HT, TH, HH
atleast one head when - HH, HT or TH
P=3/4
'not all tails' means every outcome except 'TT' = HH,TH, HT = same as 'atleast one head'
so, P = 3/4


so, will that '3/4' be equal to '1- (3/4)' ??

Answer 7

no

Answer 8

So, true or false?

Answer 9

false