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KATRIN_1 [288]
3 years ago
9

a train can either be early on time or late. the probability that the train is early is 0.2 the probability that the train is on

yome is 0.5 work out the probability that the train is late
Mathematics
1 answer:
Feliz [49]3 years ago
3 0

Answer:

0.3 Train is late

Step-by-step explanation:

20% - Train is early

50% - Train is on time

add

0.2 + 0.5 = 0.7

subtract from 1

1 - 0.7 = 0.3

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The sum of two numbers is 0. Twice the smaller number subtracted from 3 times the larger number is 10. Let x represent th larger
slava [35]
The sum of two numbers is zero.
x + y = 0
y = -x

<span>Twice the smaller number subtracted from 3 times the larger number is 10.
Let x represent the larger number and y represent the smaller number.

Twice the smaller number: 2y

3 times the larger number: 3x

</span>Twice the smaller number subtracted from 3 times the larger number is 10. 
3x - 2y = 10

-2y = -3x + 10

y = 3/2 x - 5

The equations are:

y = -x
y = 3/2 x - 5

The answer is the first choice.
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Well, let's use the Euclidean algorithm:

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Then working backwards,

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kompoz [17]

Answer:

30

Step-by-step explanation:

boys:  girls  : total

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10,20,<u>30</u>,40

Therefor the class size must be 30

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