A number is selected randomly from the integer from 10to30 what is the probability of picking a multiple of 4or5
1 answer:
Answer:
Step-by-step explanation:
Start by finding how many integers there are from 10-30...
30-10+1=20+1=21
Note we have to add 1 since it is inclusive.
Now, let's find how many multiples of 4 or 5 there are from 10-30...
4*3=12
4*4=16
4*5=20
4*6=24
4*7=28
5*2=10
5*3=15
5*4=20
5*5=25
5*6=30
5+5-1=9
Note we have to subtract 1 since 20 is counted twice.
The probability would be...
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Answer:
a= b =
Step-by-step explanation:
- By equating coefficients on both sides of respective terms.
Given,
=
+
<u>Now take </u><u>lcm</u><u> on right hand side </u>
=
By equating coefficients of respective terms
x-4 = a(x-2)+b(x+9)
a+b=1 -----1 ; 9b-2a=-4 -----2
Substitute b=1-a in 2
9(1-a)-2a=-4
11a=9+4=13
a=
As b=1-a=1- =
Answer:
The proportion of baby boys in the United States that are born with low birth weight is 0.0495.
Step-by-step explanation:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean and standard deviation
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
3.41 kg with a standard deviation of 0.55 kg.
This means that
What proportion of baby boys in the United States are born with low birth weight?
This is the pvalue of Z when X = 2.5. So
has a pvalue of 0.0495
The proportion of baby boys in the United States that are born with low birth weight is 0.0495.