Use the probability distribution graph to answer the question.

p(x≤a)=0.6

what is the value of a?

enter your answer in the box.

The value of a must be '5'.

Step-by-step explanation:

Since we have given that

P(X≤a)=0.6

That means the value of area under the curve 'a' is 0.6.

So, We start adding the values for a to approach 0.6.

i.e.

P=0.05 upto a = 1

P= 0.1 upto a = 2

P = 0.15 upto a= 3

P = 0.2 upto a = 4

P= 0.2 upto a = 5

So, we get that

So, At a = 5, we get  

P(X≤a)=0.6

Hence, the value of a must be '5'.

answer:

payment just for service  

→

$

87.12

payment for service including tax

→

$

94.09

explanation:

service only with 20% tip  

→

$

72.6

(

1

+

20

100

)

=

$

87.12

in the opening of the question the word 'service' is associated only with the pretax value.

the closing part of the question asks: how much did she pay for the  

service

−−−−−−  

so technically the answer is  

→

$

72.6

(

1

+

20

100

)

=

$

87.12

however, the intention of the question provider may have been that your answer is to be  

$

87.12

(

1

+

8

100

)

=

$

94.09

to 2 decimal places.

'

payment just for service  

→

$

87.12

payment for service including tax

→

$

94.09

tony b

mar 21, 2017

answer:

trying to explain it another way

explanation:

service charge  

.

→

$

72.60

20% tip  

20

100

×

$

72.60

=

$

14.52

−−−−−−  

←

add

$

87.12

tax  

8

100

×

$

87.12

=

$

6.97

−−−−−  

←

add

$

94.09

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