A combination lock has four wheels in a row. Each wheel has the digits from 0 to 9 on it. How many different combinations are th ere? (b)How many different combinations are there if we can only use each digit once?
1 answer:
Answer:
Step-by-step explanation:
a.10^4=10000
b.10×9×8×7=5040
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Your answer is given below:
Step-by-step explanation:
y=8-2 x
y= 8-2×8
y= 8-16
y= -8
[ Hence , the value of y is - 8 ]
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