Total tickets sold = 417
2 fractions goes to students.
1 fraction goes to adults.
Total fractions of tickets
= 2 + 1
= 3 fractions
Since adults = 1 fraction
1 fraction = 417 ÷ 3
= 139 tickets
Answer: 30× 4 = 120
120÷4 = 30
Step-by-step explanation:
If it is in fraction you could do 5/1500 and reduce it to 1/300 , to change 1/300 to whole number it would be 3 , to change 1/300 to decimal it would be .03
Answer:
Step-by-step explanation:
Given that IQ mean is 100 and std dev = 12 for normal adults

Std error = 

i.e. sample size should be atleast 97
The required sample size is 97.
This is reasonable as this is greater than 30
Yes. This number of IQ test scores is a fairly large number.