The combination expression that demonstrates how the 20 is calculated using the combination pattern is 6C3
<h3>Permutation and Combination</h3>
While combination has to do with selection, permutation has to do with arrangement.
According to the combination rule
nCr = n!/(n-r)!r!
The expression that gives the result of 20 is expressed below;
6C3 = 6!/(6-3)!3!
6C3 = 6!/3!3!
6C3 = 6!/6*6
6C3 = 720/36
6C3 =20
Hence the combination expression that demonstrates how the 20 is calculated using the combination pattern is 6C3
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4 sweets cost 28p altogether
28÷4=7p for each sweet
If each sweet costs 7p, then 7 sweets would be multiplied by 7
7×7p=49p
7 sweets cost 49p
Answer:
$28.50
Step-by-step explanation:
