3. Use the Counting Principle to find the probability.
1 answer:
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Answer:
see explanation
Step-by-step explanation:
(a)
= 1 ( any value divided by itself = 1 )
(b)
= a ( any value divide by 1 is the value itself )
(c)
×
=
The product of 2 fractions is the product of the numerators divided by the product of the denominators
(d)
÷
=
To divide 2 fractions, leave the first fraction, change division to multiplication and turn the second fraction upside down, that is
÷
=
×
=
(e)
+
=
Since the fractions have a like denominator, add the numerators leaving the denominator. This applies to subtraction also
(f)
-
=
See explanation for part (e)
Answer:
Here c represents the total number of children in choir.
As per the statement:
Total number of boys in choir = 12
It is also given that: Three sevenths of a children's choir are boys.
⇒ Total number of boys =
or
By cross multiply we have;
84 = 3c
Divide both sides by 3 we have;
c = 28
Therefore, the total number of children in choir is 28 children