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chubhunter [2.5K]
3 years ago
5

200 elementary school students were surveyed to find their blood groups. Of those, 55 were of blood group A, 85 of blood group B

, and 21 of blood group O. What is the probability that a randomly chosen student has either blood group A or blood group B? A) 0.25 Eliminate B) 0.60 C) 0.70 D) 0.81
Mathematics
2 answers:
gizmo_the_mogwai [7]3 years ago
8 0

Answer:

P(A or B) = P(A) + P(B) =  

55

200

+  

85

200

= 0.70

Step-by-step explanation:

C is correct

MA_775_DIABLO [31]3 years ago
7 0
The answer would be c for sure
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Answer:

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Step-by-step explanation:

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Find the mean, meadian, mode and range for each set of data 6, 9, 2, 4, 3, 6, 5
Helga [31]

Mean: Add up the numbers and divide the sum by the number of values in the set.

6 + 9 + 2 + 4 + 3 + 6 + 5 = 35

35 / 7 = 5

Median: Sort the set from the smallest value to the largest value and select the number in the middle. If the count of the set if even, then select the two middle values and take their mean average.

2, 3, 4, 5, 6, 6, 9

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So, the median average is 5.

Mode: What number appears the most frequently?

The mode of the set is 6 because it appears twice.

Range: Sort the set by ascending order and take the smallest value and subtract that from the largest value in the set.

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The range is 7.

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2 years ago
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Find the first derivative of y = sin^2(cos2x)
AveGali [126]
Hello,

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When calculating the effective rate of a loan, which statement or statements must be true if n is greater than 1? I. The length
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When calculating the loan's effective rate, the most accurate statement is that the effective rate will exceed the nominal rate.

<h3>Effective Annual Rate:</h3>

The interest rate for the entire year is known as the effective annual rate (EAR). Interest charges are incurred when a company uses debt or capital leases to fund its operations.

Interest is reported on the income statement, but it can also be generated on an investment or paid on a loan over time due to compounding interest.

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brainly.com/question/2405320

8 0
3 years ago
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What 2 numbers can be added to make 16 as well as multiplied to make -36
Sladkaya [172]

Answer:

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Step-by-step explanation:

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y = 2nd no.

(1)    x + y = 16            (2)     xy = -36

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The two numbers are 18 and -2

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3 years ago
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