Question

the mean for the following datta is 20.5, find the missing frequency

x f
10 5
15 7
20 _
25 12
30 6​

Answer 1

$\huge \star{\underline{\mathtt{\red{A}\pink{N}\green{S}\blue{W}\purple{E}\orange{R}}}} \star$

$Answer: F=14</p><p></p><p>Step-by-step explanation:</p><p></p><p>Given table :  </p><p></p><p>X.              Y              XY</p><p></p><p>10.             6              60</p><p></p><p>15.            10            150</p><p></p><p>20.            F             20F</p><p></p><p>25.           10             250</p><p></p><p>30.            8            240</p><p></p><p>\begin{gathered}\text{Now, Mean = }\dfrac{\sum XY}{\sum Y}=\dfrac{700+F}{34+F}\\\\\Rightarrow\ 21=\dfrac{700+F}{34+F}\\\\\Rightarrow\ 21(34+F)=700+F\\\\\Rightarrow\ 714+21F=700+F\\\\\Rightarrow\ F=14\end{gathered}Now, Mean = ∑Y∑XY=34+F700+F⇒ 21=34+F700+F⇒ 21(34+F)=700+F⇒ 714+21F=700+F⇒ F=14</p><p></p><p>$

Answer 2

Answer:

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities. Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities. Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities.