Algebra 2 % of a random number

[harold_a_shaver]

Hi, my son is in cyber school. He has an assignment due and the school site is down.This means that he can't access all the materials he needs to answer the questions. I am trying to help but....I have not done anything with Algebra for 30+ years. I will post the question and what we have done to this point but we are a little confused as to the actual sequence of solving the problem.

Suppose that 80% of the people asked said yes to a question.
Let 0-7 represent yes
Let 8 & 9 represent no.

Use the randoom numbers shown below to determine how many people out 20 answered no

Random Numbers:

.6077280428
.9258827575

doe this mean that if .6077280428 answered no that this is 20% of the total number no we need to find what the 80% is?

the possible answers are:

a) 5
b) 6
c) 14
d) 15

where does he start?

 

[tkhunny]

Use each digit of both random numbers. It's just 20 numbers. Count those that are neither 8 nor 9.

 

[harold_a_shaver]

I am a little embarrassed after seeing the post. I have been working probability problems with him all evening and read way too much into the problem.

Thanks!