The key to solve this problem is using the combination formula $nC_{r}=\frac{n!}{r!(n-r)!}$ . This mean the number of ways to choose a sample of r elements from a set of n distinct objects where order does not matter and replacements are not allowed.

The total of students is n and the only that 18 students may go is r:

$25C_{18}=\frac{25!}{18!(7!)}=480700$

6 0

3 years ago

Commonwealth Company has the following unit costs: direct materials $2, direct labor $4, variable overhead $1, fixed overhead $3

Westkost [7]

Answer: Total unit cost =

variable costs + fixed costs

$2 + $4 + $1 + $3 = $10

Step-by-step explanation:

Total unit cost is calculated by the adding variable costs ( such as the direct material cost per unit, direct labor cost per unit and variable manufacturing overhead per unit,) and fixed costs (such as fixed manufacturing overhead per unit)

Therefore

Total unit cost = variable cost + fixed cost

Unit cost of direct materials = $2

Unit cost of direct labor = $4

Unit cost of variable overhead =$1

Unit cost of fixed overhead = $3

Total unit cost = $2 +$4 + $1 + $3 = $10

4 0

4 years ago