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Levart [38]
3 years ago
6

Find the missing probability. P(A)=13/20,P(A∩B)=13/25,P(B|A)=? A. 21/100 B. 4/5 C. 1/5 D. 1/4

Mathematics
1 answer:
Paha777 [63]3 years ago
7 0

Answer:

Option (D) : 1 / 4

Step-by-step explanation:

We know that :

P(A ∩ B) = P(A) * P(B|A)

P(B|A) = P(A ∩ B) / P(A) =  \frac{13}{25}  \times  \frac{20}{13}

P(B|A) =  \frac{4}{5}

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In an examination given to a class of 20 students, the following test scores were obtained.
nexus9112 [7]

Answer:

Mean = 75

Median = 80

Mode = 85

The mode

Step-by-step explanation:

Given the data :

45 45 50 50 55 60 70 75 75 80 80 85 85 85 85 90 95 95 95 100

Rearranged data :

45, 45, 50, 50, 55, 60, 70, 75, 75, 80, 80, 85, 85, 85, 85, 90, 95, 95, 95, 100

The mean score :

ΣX / n ; n = sample size = 20

ΣX = 1500

Mean = 1500 / 20 = 75

Mode = most frequently occurring = 85 ( frequency of 4)

Median = 0.5(n + 1)th term

Median = 0.5(20 + 1)th term

Median = 0.5(21) th term

Median = 10.5th term = (10 + 11)th term / 2

Median = (80 + 80) / 2 = 160 / 2 = 80

2.) The mode

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2 years ago
Use the information below to find RV.​
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Answer:

I think Rv = 37x but if you think not then Go with You're answer

Step-by-step explanation:

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1 year ago
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aleksklad [387]

Answer:

c.

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Name the property used in each equation. Then find the value of N. <br><br> 7+(4+6)=7+n
Xelga [282]
Hi there!

Let's solve th' Eqn. :-

7 + (6 + 4) = 7 + n

⇒ 7 + 10 = 7 + n

⇒ n = 7 - 7 + 10 ⇒ n = 10

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The required answer is " n " = 10

\bf{COMMUTATIVE\:} :-

Th' Commutative property states that the order of the terms does not affect the final result.

~ Hope it helps!
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2 years ago
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