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ludmilkaskok [199]
3 years ago
15

Three coins are tossed. find the probability that two lands on heads

Mathematics
1 answer:
NeX [460]3 years ago
8 0
Only 1 coin lands on tales of 2 coins landed on heads
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To estimate the proportion of brand-name lightbulbs that are defective, a simple random sample of 400 brand-name lightbulbs is t
yaroslaw [1]

Answer:

X is a binomial random variable

Then the condition is met

Step-by-step explanation:

Sample size   n₁  = 400

X represents the number of brand-name lightbulbs)

P(X) = 44/400

P(X) = 0,11

X  is a binomial random variable it only could be either no defective or defective ( only two conditions or values).

To make use of the condition of approximation of binomial distribution to a normal distribution it is required that the products:

p*n  =  0,11*400  =  44      and    q  =  1  - 0,11   q =  0,89

q*n  =  0,89 * 400  =  356

both  p*n  q*n  are greater than 5.

Then the condition is met

4 0
3 years ago
I need help please ): !
ivanzaharov [21]

Answer:

BC=54, DE=27

Step-by-step explanation:

(7x-1)2=16x-10

x=4

7(4)-1=27

16(4)-10=54

7 0
3 years ago
Find the distance between the points (-4,5), (-12,5)
posledela

Answer:

d = 8

Step-by-step explanation:

For:

(X1, Y1) = (-4, 5)

(X2, Y2) = (-12, 5)

Distance Equation Solution:

d=(−12−(−4))2+(5−5)2−−−−−−−−−−−−−−−−−−−−√

d=(−8)2+(0)2−−−−−−−−−−√

d=64+0−−−−−√

d=6–√4

d=8

Therefore, the distance between (-4,5), (-12,5) is 8.

5 0
3 years ago
A uber charges $8 to get in the car and $0.75 each mile. A taxi company charges $3 to get in the cab and $1.25 each mile. For ho
marishachu [46]
It would be every 10 miles. Take the 8 uber charges and add the .75 x 10 giving you 15.50

uber 8 + (.75 x 10) = 8 + 7.50 = 15.50


Do the same with the taxi cost. 3 + (1.25 x 10) = 3 + 12.50 = 15.50 
4 0
4 years ago
-b+10b+2b+17=6 please help me
anzhelika [568]

Answer:

-1

Step-by-step explanation:

-b+10b+2b+17=6

9b+2b+17=6

11b+17=6

11b=6-17

11b=-11

b=-1

5 0
3 years ago
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