3 years ago

QUICK PLEASE Which expression is equivalent to 45−20s ? 25−s B 5(9−4s) C s(45−20) D 5s(9−4)

Mathematics

1 answer:

Ede4ka [16]3 years ago

8 0

Answer:

B. 5(9−4s)

Step-by-step explanation:

if you simplify that option it would be

45 - 20s

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gladu [14]

Answer:

A) Not mutually exclusive

Step-by-step explanation:

Given

$P(A) = \frac{1}{4}$

$P(B) = \frac{3}{5}$

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Required

Determine if they are mutually exclusive or not

Mutually exclusive are defined by:

$P(A\ or\ B) = P(A) + P(B)$

So, we have:

$P(A\ or\ B) = \frac{1}{4} + \frac{3}{5}$

Take LCM

$P(A\ or\ B) = \frac{5+12}{20}$

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By comparing:

$P(A\ or\ B) = \frac{17}{20}$ ---- Calculated

$P(A\ or\ B) = \frac{7}{10}$ ---- Given

We can conclude that A and B are not mutually exclusive because:

$\frac{17}{20} \ne \frac{7}{10}$

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