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mr Goodwill [35]
2 years ago
14

The teacher of a class that contains 12 boys and 16 girls needs to pick two volunteers. She randomly selects one student, then a

nother student from the class. Find the probability that a) she chose one boy then one girl. b) she chose one boy and then another boy.
Mathematics
1 answer:
Otrada [13]2 years ago
7 0

Answer:

1 boy then 1 girl = 48 in 189 probability.  1 boy then 1 boy = 33 in 132 probability

Step-by-step explanation:

1 boy then 1 girl:

12/28 x 16/27

1 boy then 1 boy:

12/28 x 11/27

Simplify the fractions to make it easier.

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What is the answer for -4 (-6x + 3 ) =12
liq [111]

Answer:

x=1

Step-by-step explanation:

Simplify:

24x-12=12

add 12 on both sides:

24x=24

divide both sides by 24

x=1

Hope this helps!

4 0
2 years ago
If r = 25 cm and s = 7 cm, what is the length of t?
Alina [70]
The length would be 15
8 0
3 years ago
Which answer is correct?
dalvyx [7]
(x-p)(x-q)
x^2 -qx -px + pq
x^2 -(q+p) x +pq
so the constant here is the product of p & q
the answer is A
8 0
3 years ago
Read 2 more answers
You are making sets of pens and pencils to sell. You want each set to contain the same combination of pens and pencils. You have
harkovskaia [24]
The greatest number of the sets you can make are 32 sets 
5 0
3 years ago
A quality control inspector has drawn a sample of 19 light bulbs from a recent production lot. If the number of defective bulbs
Inessa05 [86]

Answer:

0.0016283

Step-by-step explanation:

Given that:

Proportion of defective bulbs, p = 30% = 0.3

Sample size, n = 19 bulbs

Probability that the lot will pass inspection :

P(none of the 19 is defective) Or P(only one of the 19 is defective)

P(none of the 19 is defective) = (1 - p) ^n = (1 - 0.3)^19 ; 0.7^19

0.7^19 = 0.0011398

P(only one of the 19 is defective) :

P(1 defective) * P(18 not defective )

(0.3) * (1 - 0.3)^18

0.3 * 0.7^18

0.3 * 0.001628413597910449 = 0.0004885

Hence,

P(none of the 19 is defective) + P(only one of the 19 is defective)

0.0011398 + 0.0004885) = 0.0016283

8 0
3 years ago
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