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3 years ago

8

Rita needs to buy some dog food. At the nearest store, 4 bags of dog food cost $26.8. How much would Rita spend on 8 bags of dog

food?

1 answer:

Step2247 [10]3 years ago

7 0

Answer:

$53.6

Step-by-step explanation:

$\frac{4}{26.8} =\frac{8}{x} \\\\4x=214.4\\x=53.6$

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Answer:

$P(x \le 3) = 0.9920$

Step-by-step explanation:

Given

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$n = 14$ -- selected drivers

Required

$P(x \le 3)$

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$P(x ) = ^nC_x * p^x * (1 - p)^{n-x}$

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$P(x \le 3) = P(x = 0) +P(x = 1) +P(x = 2) +P(x = 3)$

$P(x=0 ) = ^{14}C_0 * (6\%)^0 * (1 - 6\%)^{14-0} = 0.42052319017$

$P(x=1 ) = ^{14}C_1 * (6\%)^1 * (1 - 6\%)^{14-1} = 0.37578668057$

$P(x=2 ) = ^{14}C_2 * (6\%)^2 * (1 - 6\%)^{14-2} = 0.15591149513$

$P(x=3 ) = ^{14}C_3 * (6\%)^3 * (1 - 6\%)^{14-3} = 0.03980719024$

So, we have:

$P(x \le 3) = 0.42052319017+0.37578668057+0.15591149513+0.03980719024$

$P(x \le 3) = 0.99202855611$

$P(x \le 3) = 0.9920$ -- approximated

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