Answer:
r =.3 is wrong for 2x = -6. you divide -6/2 which = -3 so r = -3
Answer:

Step-by-step explanation:
To use the least number of terms, simplify the expression. To simplify, distribute into the parenthesis and combine like terms.

No of people not from their neighborhood=25-20=5
total contact s=25
therefore probability to call a person not from his neighborhood=5/25=1/5
therefore P=1/5
The answer is B 1 =52 2=66