Question

The letter tiles c, a, r, e, and s are placed in a box. Without looking someone picks a letter tile from the box and records the results before placing it back. They repeat the procedure 100 times and observe the following results. The frequency of C is 20, the frequency of A is 25, the frequency of r is 30, the frequency of e is 10, and the frequency of S is 15. Be still the observed frequency what is the probability that someone will pick the letter r. Write the answer in percent form

Answer 1

The total number of trials is 100. The frequency of selecting the letter r is 30.

The probability of selecting the letter r is calculated as:

Probability = (Frequency of r) / (Total number of trials)
Probability = 30 / 100
Probability = 0.3

Multiply by 100 to convert to percent:
Probability = 0.3 * 100
Probability = 30%

Therefore, the probability of someone picking the letter r is 30%.