A brother and a sister are in the same math class. There are 8 boys and 10 girls in the class. One boy and one girl are randomly
2 answers:
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Answer:
The percent of callers are 37.21 who are on hold.
Step-by-step explanation:
Given:
A normally distributed data.
Mean of the data, = 5.5 mins
Standard deviation, = 0.4 mins
We have to find the callers percentage who are on hold between 5.4 and 5.8 mins.
Lets find z-score on each raw score.
⇒ ...raw score,
=
⇒ Plugging the values.
⇒
⇒
For raw score 5.5 the z score is.
⇒
⇒
Now we have to look upon the values from Z score table and arrange them in probability terms then convert it into percentages.
We have to work with P(5.4<z<5.8).
⇒
⇒
⇒
⇒ and
.<em>..from z -score table.</em>
⇒
⇒
To find the percentage we have to multiply with 100.
⇒
⇒ %
The percent of callers who are on hold between 5.4 minutes to 5.8 minutes is 37.21
Answer:
(a) P(next ball with blue) = (b) P(Not to be red) =
(c) P(drawing 70 times yellow ball) = .
Step-by-step explanation:
Given that,
The total outcomes of the color of tile are :-
Red , Red, Blue, Yellow, Blue, Red, Green, Red, Blue, Green.
From the Question,
Total number of outcomes = 10
(a) What is the probability that her next draw will be blue ?
Red = 4,
Blue = 3,
Green = 2,
Yellow = 1.
P(next ball with blue) = .
(b) What is the probability that her next draw will NOT be red?
P(Red ball) =
But we have to find
P(Not to be red) =
(c) If Amy draws 70 more times with the same tiles from the question above, what probability would you expect a yellow?
P(Yellow ball) =
drawing it 70 times we get the probability
P(drawing 70 times yellow ball) = .