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liraira [26]
2 years ago
7

1. Heather has a very important exam to take in the morning. Since she wants to be sure that she will wake up in time, she sets

two alarm clocks. One has a .95 probability that it will ring, and the other has a .98 probability that it will ring. She sets both clocks. What is the probability that at least one of the alarm clocks will wake her up?
A. 0.9025
B. 0.9310
C. 0.9604
D. 0.9800
E. 0.9990
Mathematics
1 answer:
Klio2033 [76]2 years ago
5 0
The correct answer for the question that is being presented above is this one: "C. 0.9604." T<span>he probability that at least one of the alarm clocks will wake her up is </span>0.9604. Heather has a very important exam to take in the morning. <span>Since she wants to be sure that she will wake up in time, she sets two alarm clocks. </span>
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<h2>Given :-</h2>

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<h2>To Find :-</h2>

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<h3 /><h3 /><h2>Solution :-</h2>

Let, the first angles be 5x

And, the second angles will be 2x

As we know that,

★ Sum of all angles = 180° ★

According to the question by using the formula we get,

  • ⇒ 5x+2x=180°

  • ⇒7x=180°

  • ⇒ \sf x =\: \dfrac{\cancel{180^{\circ}}}{\cancel{7}}

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Hence, the required angles are,

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As we know that, 

opposite angles in a parallelogram

is equal.

∴ The all angles of a parallelogram is 128.5°,51.4°, 128.5° and 51.4°.

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Answer:

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Step-by-step explanation:

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