Answer:
20%
Step-by-step explanation:
3 out of 15 is the same as 3/15 = 1/5. 1/5 is the same as 20%
The answer is D, there is no bias as Josh used random sampling.
Answer:
B. 
Step-by-step explanation:
Given expression is 
Simplifying the expression now
Lets use distributive property of multiplication to solve it.
As given, 
Distributing -6 with b and 2.
= 
Opening the parenthesis
= 
= 
∴ As from the given options,
is the correct choice.
Answer:
80%
Step-by-step explanation:
50 x 50 would be 100 and 50kg=100% and 10 x 2 = 20 so you used 20% therefore you have 80% left.