Question

A coin is tossed four times. Assuming that the coin is equally likely to land on heads or tails, compute the probability of the event occurring. (Enter
the probability as a fraction.)
At least two tails​

Answer 1

Answer:

11/16

Explanation:

HHHH, HHHT,

HHTH, HTHH,

THHH, [HHTT,]

[HTHT], [HTTH],

[TTTT], [TTTH,]

[TTHT], [THTT]

[HTTT,] [TTHH,]

[THTH,] [THHT]

If we look at this, we see that there are 11 ways out of 16 in which we get at least 2 tails.