Answer:
its means a varieble or an unknown value
Step-by-step explanation:
In 371 ways Mrs. Sullivan choose two students from 27 to help put away calculators at the end of class
Step-by-step explanation:
let us assume that Mrs.Sullivan wants to choose 2 students from a group of 27 students
So ,in the first choice we have 27 students
In the second choice we have 26 choices
So Mrs.Sullivan has = 27 × 26 = 702 ways
But each group repeated twice,in order to avoid that we will divide the answer by 2
so we will write
= 702 ÷ 2 =<u> 351 ways</u>
<u>This method of calculation is called Combination</u>
1.7. Use a calculator, bud.
Both is a good deal. But the better deal is 10 liters for 24 dollars. Because there is more. Although 1 liter costs 2 dollars and 40 for both deals.
15 girls 12 boys 5x3=15 and 4x3=12 so 15 girls 12 boys
