Can someone help me with these 2 please thank you :)
1 answer:
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Answer:
650,000,000 student ID numbers are possible if the letters cannot be repeated.
Step-by-step explanation:
The order in which the digits or letters are placed is important, which means that the permutations formula is used to solve this question.
Permutations formula:
The number of possible permutations of x elements from a set of n elements is given by the following formula:
In this question:
2 letters from a set of 26(permutations, as letters cannot be repeated).
6 digits, each with 10 possible outcomes.
How many student ID numbers are possible if the letters cannot be repeated?
650,000,000 student ID numbers are possible if the letters cannot be repeated.
Answer:
Step-by-step explanation:
Turn 2 7/10 to an improper fraction
2 7/10 = 27/10
27/ 10 divided by 1/2 is the same as multiplying 27/10 by the reciprocal of 1/2
27/10 * 2 = 5 2/5
The answer is
Hope this helps :)
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