Answer:
1/5
Step-by-step explanation:
This are the possible outcome
RRR BBB YYY
RBY RYB RYY RBB
BRY BYR BRR BYY
YRB YBR YRR YBB. Total 15
R red
B blue
Y yellow
Probability = numbers of required outcome/number of possible outcome
No of possible outcome =15
No of required outcome = 3 red marbles
So
3/15
P(3red marbles) =1/5
<em>Answer: Function A= (0,8)</em>
<em>Function B= (0,2)</em>
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<em>{(-4,12),(0,-1),(4,0),(x,y)} =6(4.0),(x,y)</em>
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<em>I didn’t do the last one I’m sorry </em>
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<em>Step-by-step explanation:</em>
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Answer:
7/10
Step-by-step explanation:
4,5,6,7,8,9,10
7 numbers counting four so 7/10
Answer:
unit rate= 4-kilometers/minute expected time= 56 minutes
Step-by-step explanation:
14 kilometers x 4 kilo/minute = 56 minutes
Answer:
25
Step-by-step explanation:
The Empirical Rule states that, for a normally distributed random variable:
68% of the measures are within 1 standard deviation of the mean.
95% of the measures are within 2 standard deviation of the mean.
99.7% of the measures are within 3 standard deviations of the mean.
In this problem, we have that:
Mean = 175cm
Standard deviation = 6 cm
Percentage of students below 163 cm
163 = 175 - 2*6
So 163 is two standard deviations below the mean.
By the Empirical rule, 95% of the heights are within 2 standard deviations of the mean. The other 100-95 = 5% are more than 2 standard deviations of the mean. Since the normal distribution is symmetric, 2.5% of them are more than 2 standard deviations below the mean(so below 163cm) and 2.5% are more than two standard deviations above the mean.
2.5% of the students have heights less than 163cm.
Out of 1000
0.025*1000 = 25
25 is the answer