Question

The tree diagram shows all the possible combinations for heads (H) and tails (T) when 3 coins are tossed. What is the probability that the outcome has at least two heads?

Answer 1

Answer:

No diagram so I'll make one:

H H H

H H T

H T H

T H H

T T H

T H T

H T T

T T T

There are 8 possible outcomes and four of these have 2 heads.

Probability = 4 / 8 = .50

Step-by-step explanation:

Answer 2

Probability of getting at least two heads after tossing 3 coins is equals to (1 / 2).

What is probability?

" Probability is defined as a mathematical statement which represents the ratio of number of favourable outcomes to the total number of outcomes."

Formula used

Probability = $\frac{Number of favourable outcomes}{Total number of outcomes}$

According to the question,

Number of coins tossed =3

As shown in the tree diagram drawn we have,

Total number of outcomes = 8

At least two heads means 2 or more than two

Here.

HHH, HHT,HTH, THH

Number of favourable outcomes of getting at least two heads = 4

Substitute the value in the formula of probability we get,

Probability = (4 / 8)

                  = ( 1 / 2)

Hence, probability of getting at least two heads after tossing 3 coins is equals to (1 / 2).

Learn more about probability here

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