Question

12. Mrs. Sands' class had an ice-cream party. Of all the students, 2/5 chose 5 points vanilla ice cream, 3/10 chose chocolate ice cream, and the rest chose strawberry ice cream. What fraction of the class chose strawberry ice cream? * 5/10 O 3/10 3/5 7/10

Answer 1

3/10 (option B)

Step-by-step explanation:

fraction that chose vanilla ice cream = 2/5

fraction that chose chocolate ice cream = 3/10

let the fraction that chose strawberry ice cream = y

Total fraction = 1

fraction that chose vanilla ice cream + fraction that chose chocolate ice cream + fraction that chose strawberry ice cream = 1

2/5 + 3/10 + y = 1

`\begin{gathered} (2)/(5)+(3)/(10)+y=1 \\ (2(2)+3(1))/(10)+y\text{ = 1} \\ (4+3)/(10)+y\text{ = 1} \end{gathered}`
`\begin{gathered} (7)/(10)+y\text{ = 1} \\ y\text{ = 1-}(7)/(10) \\ y\text{ = }(10(1)-7)/(10) \\ y\text{ =}(10-7)/(10) \\ y\text{ = 3/10} \end{gathered}`

Fraction of the class chose strawberry ice cream is 3/10 (option B)