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never [62]
4 years ago
11

The price of an air conditioner was reduced from rs 27000 to rs 24000 find the rate of percentage

Mathematics
2 answers:
k0ka [10]4 years ago
5 0
3000 because the rate of change is from 27000 to 24000 so that's the rate of change but I have no idea what the percentage rate of change is omega lul
makkiz [27]4 years ago
4 0

Answer:

The percentage decrease in price of Air conditioner is 33.33%  

Step-by-step explanation:

Given as :

The initial price of air conditioner = Rs 27000

The reduce price of air conditioner = Rs 24000

Let the rate of percentage = x %

So,  % decrease = \frac{\textrm initial value - \textrm final value}{\textrm initial value} × 100

Or,  % decrease = \frac{\textrm 27000 - \textrm 24000}{\textrm 27000} × 100

Or , % decrease = \frac{3000}{27000}  × 100

Or,  % decrease = \frac{100}{9}

Or. % decrease = 33.33 %

Hence The percentage decrease in price of Air conditioner is 33.33%   Answer

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3 years ago
A teacher was interested in finding out whether a special study program would increase the scores of students on a national exam
bija089 [108]

Answer:

Check the explanation

Step-by-step explanation:

Going by the first attached image below we reject H_o against  H_1 if obs.T > t_{\alpha /2;n-1}

here obs.T=1.879

\therefore obs.T \ngtr 2.447=t_{0.025;6}

we accept H_o:\mu _{1}=\mu_{2} at 5% level of significance.

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1.

this problem is simillar to the previous one except the alternative hypothesis.

Let X_i's denote the bonuses given by female managers and Y_i's denote the bonuses given by male managers.

we assume that X_i \sim N(\mu _{1},\sigma _{1}^{2}) Y_i \sim N(\mu _{2},\sigma _{2}^{2}) independently

We want to test H_0:\mu_{1}=\mu_{2} vs H_1:\mu_{1}\neq \mu_{2}

define D_i=X_i-Y_i , i=1(1)8

now D_i\sim N(\mu _{1}-\mu _{2}=\mu _{D},\sigma _{1}^{2}+\sigma _{2}^{2}=\sigma _{D}^{2}) , i=1(1)8

the hypothesis becomes

H_0:\mu_{D}=0 vs H_1:\mu_{D}\neq 0

in the third attached image, we use the same test statistic as before

i.e at 5% level of significance there is not enough evidence to indicate a difference in average bonuses .

3 0
3 years ago
Can someone help me pls
Crank

Answer:

figure it out

Step-by-step explanation:

yeeeeet

7 0
3 years ago
Hey you click and answer :}
Contact [7]

Answer:

Hey :)

Step-by-step explanation:

3 0
3 years ago
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