In the given figure, AB is a diameter of the
circle APBR. APQ and RBQ are straight
lines. If ZA=35° and, then the measure
of PBR is
Answers
Answer:
This is a classic example of finding mean and standard deviation using Z values.
From this page find the Z value corresponding to 31% area under the curve and 92% (100-8) percent area under the curve.
Math Is Fun Virtual Manipulative
Note: You'll probably be given tables to lookup in your quizzes.. they're a bit confusing. But you might as well learn how to use it.
As you know:
Z=X−μσZ=X−μσ
Put in X and Z values values twice, you'll have two linear equations. Solve them and the answer is yours!
Step-by-step explanation:
This is a classic example of finding mean and standard deviation using Z values.
From this page find the Z value corresponding to 31% area under the curve and 92% (100-8) percent area under the curve.
Math Is Fun Virtual Manipulative
Note: You'll probably be given tables to lookup in your quizzes.. they're a bit confusing. But you might as well learn how to use it.
As you know:
Z=X−μσZ=X−μσ
Put in X and Z values values twice, you'll have two linear equations. Solve them and the answer is yours!
Let C.P be
′
x
′
Profit=25%
S.P=C.P(1+
100
profit%
)
S.P=x(1+
100
25
)
=x(1+
4
1
)
=
4
5x
If C.P were 20%less,
New C.P=x(1−
100
20
)
=x(1−
5
1
)
=
5
4x
New S.P=
4
5x
−38.75
∴Profit=S.P−C.P=
4
5x
−38.75−
5
4x
=
20
9x
−38.75
ATP, now profit %=30%
=>
5
4x
20
9x
−38.75
×100=30
As,Profit%=
C.P
profit
×100
20
9x
−38.75=
100
30
×
5
4x
20
9x
−38.75=
25
6x
20
9x
−
25
6x
=38.75
100
45x−24x
=38.75
21x=3875
x=
21
3875
=184.52≈185
∴C.P=Rs.185