Atm personal identification number (pin) codes typically consist of four-digit sequences of numbers. find the probability that if you forget your pin, then you can guess the correct sequence (a) at random and (b) when you recall the first two digits.

(a) 0.0001 or 0.01%

(b) 0.01 or 1%

Step-by-step explanation:

Since there are 10 possible numeric digits (from 0 to 9), and there is only one correct digit, there is a 1 in 10 change of getting each digit right.

The probability that if you forget your PIN, then you can guess the correct sequence

(a) at random:

(b) when you recall the first two digits.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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its kind of blurry. can you put a clearer pic?

step-by-step explanation: