Question

use the frequency table to find the probability of at most 4 responses received to this week's newspaper editorials.

Answer 1

B

Explanation:

To get probability of AT MOST 4 responses means all the probabilities Equal to or Less Than 4.

From the table, that is probability of 0, 1, 2, 3 or 4. (OR in probability means adding)

Hence, we add the number of editorials for P=0,1,2,3, and 4 and then divide by total number of editorials.

`P(\leq4)= (20+30+56+38+34)/(200)\\P(\leq4)=(178)/(200)\\P(\leq4)=0.89`

Answer choice B is right.