Question

A school population consists of 33 seventh-, 47 eighth-, and 37 ninth-grade students. If we select one child at random from the total group of students, what is the probability that the child is in the ninth-grade

Answer 1

To find the probability of selecting a ninth-grade student from a school population, divide the number of ninth-grade students by the total population.

Step-by-step explanation:

To find the probability that a randomly selected student is in the ninth-grade, we need to calculate the fraction of ninth-grade students out of the total population of students. Here's how:

1. Add up the number of seventh, eighth, and ninth-grade students: 33 + 47 + 37 = 117.
2. Divide the number of ninth-grade students by the total population: 37 / 117 = 0.316 (rounded to three decimal places).

The probability that the randomly selected student is in the ninth-grade is approximately 0.316, or 31.6%.

Answer 2

Step-by-step explanation:

Total number of students: 33 +47 +37 = 117 students

Students in 9th class = 37

So probabilty of selecting a 9th class student from a class of 117 students is:

=>(Total student in 9th class)/(Total student in the sample)

=>37/117 =>Ans