The tree diagram below illustrates the possible outcomes of three tosses of a balanced coin. What is the probability that “heads
” will come up exactly two out of three times
A.1/8
B.1/4
C.3/8
D.1/2
A.1/8
B.1/4
C.3/8
D.1/2
1 answer:
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ANSWER
C. 58°
EXPLANATION
The sum of the interior angles of a triangle is 180°.
We sum all the three angles to obtain,
.
We group like terms to get,
.
Simplify,
.
Combine like terms to get,
.
Simplify,
.
Divide both sides by 32 to get,
.
We substitute the value of x into the expression for
.
This implies that,
.
.
.
The correct answer is C