(a): We have 7 possibilities of numbers, and we need to choose 5 numbers that can repeat. So, for each of the 5 numbers, we have 7 possibilities. To determine how many codes are possible, we just need to multiply the number of possibilities of each of the 5 numbers, so we have 7x7x7x7x7, or 7^5, which is 16807 possibilities.

(b): to put the correct code in the first try, we need to find the exact combination (just one combination) among these 16807 possibilities, so the probability is 1/16807, which is 0.0000595, or 0.00595%.

8 0

3 years ago

Read 2 more answers

thare are 7/8 kilograms of salt in the kitchen . mrs. lopez used 7/15 of the salt when she was preparing dinner. how much salt d

ipn [44]

Answer: 49/120kg

Step-by-step explanation:

7/8•7/15 = 49/120

8 0

3 years ago

Which phrase describes the algebraic expression (image)? the product of 8 and 7 more than a number the quotient of 8 and 7 8 tim

scZoUnD [109]