the grade distribution of the many students in a geometry class is as follows. grade a b c d f frequency 28…

the grade distribution of the many students in a geometry class is as follows. grade a b c d f frequency 28 35 56 14 7 find the probability that a student earns a grade of b. p(b) = ?

the grade distribution of the many students in a geometry class is as follows. grade a b c d f frequency 28 35 56 14 7 find the probability that a student earns a grade of b. p(b) = ?

Answer

Explanation:

Step1: Calculate total number of students

$28 + 35+56 + 14+7=140$

Step2: Calculate probability of getting B grade

$P(B)=\frac{\text{Frequency of B}}{\text{Total frequency}}=\frac{35}{140}=\frac{1}{4}$

Answer:

$\frac{1}{4}$