Calculating Probability of Pressing Special Keys on a Telephone Keypad
The question asks about the probability of pressing one of the two special keys on a telephone keypad that has numbers 0 through 9 and two special keys, for a total of 12 keys.
To solve this probability question:
- Total number of keys = 12 (0-9 plus two special keys)
- Number of special keys = 2 (the # and * keys)
The probability of pressing one of the special keys is:
Number of special keys / Total number of keys = 2 / 12 = 1 / 6
To convert this to a percentage, multiply by 100:
(1 / 6) * 100 = approximately 16.67%
So, the closest answer from the options provided is:
C. 17%
Therefore, the answer to the question is C. 17%.
