A sociology teacher asked her students to complete a survey at the beginning of the year. One survey question asked, "How responsible are you?" Another question asked, "How many
siblings do you have?"
The probability that a student is responsible is 0.4, the probability that a student has 0
siblings is 0.45, and the probability that a student is responsible and has 0 siblings is 0.1.
What is the probability that a randomly chosen student is responsible or has 0 siblings?

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

c

step-by-step explanation:

answer: 3.26019516

step-by-step explanation: