the probability that jenya recieves 4 spam-emails is 4% . If she recieves 520 emails a week, how many can you expect to be spam?
1 answer:
20.8 or if you have to round, 21
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x2 = -13x - 4=
2x = -13x - 4=
2x+13x=-13x-4+13x
15x=-4
x=4/15
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