22) a biology professor claims that, on the average, 15% of her students get a grade of ,
30% get a b, 30% get a c, 10% get a d, and 15% get an f. the grades of a random
sample of 117 students were recorded. the following table presents the results.
grade 1 1
observed | 12
2
51
3
23
4
28
5
3
what is the value of x? ?
a) 11.143
d) 47.900
c) 9.488
b) 49.038
c.
there were 40 individuals in the category 0