A social survey asked 2500 U.S teens (ages 13-19) how many test messages they send on the first monday in december of the given year. The results are presented in the following table:

Number of texts	Frequency	Relative Frequency
0-9	71
10-19	292
20-29	280
30-39	397
40-49	428
50-59	439
60-69	379
70+	214

A.) Find the relative frequencies (fill in the table)

B.) Do the probabilities add up to 1? Should they?

C.) What is the probability that a teen selected at random will text 10-29 times on that Monday?

D.)What is the probability that a teen selected at random will test 0-9 times or 70+ times on that Monday?

E.) What is the probability that a teen selected at random will NOT text exactly 30-39 times on that Monday?

F.) What is the probability that teens will text 30-59 times on that Monday?