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sweet-ann [11.9K]
2 years ago
14

Jillian guessed at random for each question on a true-false quiz of ten questions. what is the probability that she got exactly

seven questions correct?​
Mathematics
1 answer:
Dahasolnce [82]2 years ago
3 0

Answer:

11/64

Step-by-step explanation:

Each question can be answered in 2 ways

∴ Total ways in which 10 questions can be answered

=2¹⁰

No. of ways of guessing at least 7 questions

out of 10

=7 questions correct +8 questions correct

+9 questions correct +10 questions correct

= ¹⁰C7(1)⁷+ ¹⁰C8(1)⁸+ ¹⁰C9(1)⁹+ ¹⁰C10(1)¹⁰

= 120 + 45 + 10 +1

=176

..Required Probability =176/2¹⁰

.. =11×16/2¹⁰

=11/64

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kirill115 [55]

Answer:

<h2>621.207km</h2>

Step-by-step explanation:

We are expected to convert from miles to kilometer

first day 85 miles =136.794km

Second day 125 mile=201.168km

third day 176 miles =283.245km

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Therefore the total distance in kilometer is 621.207km

8 0
3 years ago
Maria owns four par value $1,000 bonds from Prince Waste Collection. The bonds pay yearly interest 7.7%, and had a market value
monitta

Answer:

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Step-by-step explanation:

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4 years ago
Read 2 more answers
If I have to move the constant over to one side, what value would I have to add to the left side in order to complete the square
trapecia [35]

Answer:

To make the equation complete square , we have to add 11 .

Step-by-step explanation:

Given as :

The linear equation is

x² + 4 x - 5 = 2

Now, move the constant to left side of equation

So, x² + 4 x - 5 - 2 = 0

Or, x² + 4 x - 7 = 0

<u>Now, to make equation complete square , let add 11 both side</u>

So, x² + 4 x - 7 + 11 = 11

Or, x² + 4 x + 4 = 11

Now, applying mid-term break

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6 0
3 years ago
What are all the multiplication facts that have the product of 32
horrorfan [7]
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1 × 32     
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8 0
4 years ago
Given that (-9,4) is on the graph of f(x), find the corresponding point for the function 4f(x).
Kryger [21]

Answer:

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Step-by-step explanation:

To find this point, we simply need to multiply both points by 4.

-9 * 4 = -36

4 * 4 = 16

5 0
3 years ago
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