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kenken2583
13.06.2020 •
Mathematics
Members of the video club choose a Personal identification Number (PIN) consisting of two letters (from the 26-letter English alphabet) followed by two numbers. Find the probability of a thief guessing the correct pin on the first try. Write your answer as a fraction or ratio.
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Ответ:
1/67600
Step-by-step explanation:
Possible digits: {0,1,2,3,4,5,6,7,8,9}
Number of possible Personal Identification Number (PIN) is:
Number of possible letters*Number of possibles letters*Number of possible digits*Number of possible digits = 26*26*10*10 = 67600
The probability of a thief guessing the correct pin on the first try is: 1/67600
Ответ:
D
Step-by-step explanation:
There is a 100% chance that the arrow will land on red or green or blue.
For just red: 25% chance
For just blue: 10% chance
10%+25%=35% chance it will land on red or blue.
100%-35%= 65% chance the arrow will land on green.
65%