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KatRina [158]
3 years ago
7

Complementary events must have a sum of 1.

Mathematics
1 answer:
Bas_tet [7]3 years ago
8 0

This is a true statement.

Consider two events A and B. We say they are complementary if P(A)+P(B) = 1

This means that either event A or event B must happen, since the "1" represents 100% probability. Having a probability of 100% means absolute certainty.

---------

Example:

A = the event it rains

B = the event it does not rain

P(A) = 0.30 = 30% chance of rain

P(B) = 0.70 = 70% chance it does not rain

P(A)+P(B) = 0.30+0.70 = 1

So this shows the two events are complementary.

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inna [77]

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Step-by-step explanation:

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cuatro menos de 5 veces las pelotas de fut = 8x5 = 40, 40-4 = 36

seis mas de la mitad de beis = 36/2 = 18, 18+6 = 24

LISTO

7 0
2 years ago
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Ksivusya [100]

Answer:

x = 2

Step-by-step explanation:

8

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(

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7 0
2 years ago
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Vinil7 [7]

Answer:

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Step-by-step explanation:

4 0
2 years ago
It's the 2nd question I know how it is done ....sum and product method but the root is confusing me can any one explain me plz
weeeeeb [17]
Hey,
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Here the product=10
And,sum=3root5
=>2x^2+2root5x+root5x+5
=>2x(x+root5)+ root5(x+root5)
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8 0
3 years ago
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Step-by-step explanation:

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