Question

Please helpppp

This probability distribution shows the
typical grade distribution for a Geometry
course with 35 students.
Grade
A
B
С
D
F
Frequency 5
10
15
3
2
Find the probability that a student earns a w
grade of B or C.
p = [?]
Enter a decimal rounded to the nearest hundredth.
Enter

Answer 1

`\huge{ \fbox \color{cyan}{Answer}}`

`\tt \implies \: P \: \rightarrow \: 0.71 \\ \\ \\ \tt \: \: \: { \underline { \green{Solution}}} :`

`\tt \bf \: \: Given : \: \: Grade \: \: \: \: \: \: \: frequency`

`\therefore \tt Total \: \: number \: \: of \: \: students \: \: are \: \: 35`

`\tt \bf \underline{ATQ} : A \: \: student \: \: earn \: \: a \: \: Grade \: \: of \: \: B \: or \: C \:`

`\tt \rightarrow \: Grade \: B \: + \: Grade \: C \: \: = 10 + 15 = 25`

`\sf \: \text{\blue{ Apply formula}} :`

`\tt \: \circ \: Probability =( (number \: of \: favourable \: outcome)/(total \: number \: of \: outcomes) )`

`\tt \: \rightarrow \: p(grade \: \: b \: \: or \: \: c) = \cancel (25)/(35) = \cancel (5)/(7) = 0.714`

`\tt \: round \: to \: nearest \: \: hunderath`

`\tt \bf \implies \: \fbox{ \pink{0.71}}`