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andrezito [222]

3 years ago

11

An exam consists of 10 true-or-false questions. If a student guesses at every answer, what is the probability that he or she wil

l answer exactly 6 questions correctly?

1 answer:

Bond [772]3 years ago

5 0

1/2 x 1/2 x 1/2 x 1/2 x 1/2 x 1/2 = 1/64.

I think there is is 1/64 chance.

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Find the sum of the following ap .1) 1/15, 1/12, 1/10,....,to 11 terms

sertanlavr [38]

Answer:

33/20

Step-by-step explanation:

1/12 - 1/15 = 5/60 - 4/60 = 1/60

d = 1/60

a_n = a_1 + d(n - 1)

a_11 = 1/15 + (1/60)(11 - 1)

a_11 = 1/15 + 1/6

a_11 = 4/60 + 10/60

a_11 = 14/60

a_11 = 7/30

a_12 = 14/60 + 1/60

a_12 = 15/60

a_12 = 1/4

s_n = n(a_1 + a_n)/2

s_11 = 11(1/15 + 7/30)/2

s_11 = 11(2/30 + 7/30)/2

s_11 = 11(9/30)/2

s_11 = 99/60

s_11 = 33/20

8 0

3 years ago

Can someone please do this for me?

san4es73 [151]

Answer:

64°

Step-by-step explanation:

<em>So supplement angles are equal to 180, so first our two angles added together will be 180:</em>

x + x = 180

<em>Now one of these angles is 6 greater than half:</em>

x + (x/2 + 6) = 180

<em>Then we will solve for x:</em>

x + (x/2 + 6) = 180

x + x/2 + 6 = 180

x + x/2 = 174

$\frac{3}{2}$ x = 174

x = 116

<em>Plug it back in:</em>

x + (x/2 + 6) = 180

/\

x/2 + 6

(116)/2 + 6

64

<em>To check:</em>

116 + 64 = 180 ✓

6 0

3 years ago

If a sample mean is 96, which of the following is most likely the range of possible values that best describes an estimate for t

Helen [10]

Answer:

80,112

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

I am M I am a number between 17 and 25 I am a multiple of 36 is not a factor of mine what am I

Leni [432]

Answer:

wat

Step-by-step explanation:

8 0

3 years ago

Select the correct answer.

marusya05 [52]

Well i havent read the story but from context clues id say its B

6 0

1 year ago