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Find the value of f1 and …

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Find the value of f1 and f2 ci- 10-30 ,30-50, 50-70 70-90, 90-110,110-130 and fi 5,8,f1 ,20,f2,2 respectively and total fi are 50 and mean 65.6 please give me answer with proper explanation pl

Posted by ????? ??? 6 years, 10 months ago

CBSE > Class 10 > Mathematics

4 answers

जय बाबा मोहन राम की।। गुर्जर कबीर।। Bansal 6 years, 10 months ago

f1 = 12 and f2 = 3

Abc . 6 years, 10 months ago

xi will be —> 20,40,60,80,100,120... Fixi —> 100,320,60F1,1600,100F2,240...,, sum of Fixi will be ? 2260+60f1+100f2... Mean =65.6(given)....£Fixi/£Fi= 65.6... 2260+60F1+100F2/50=65.6... 2260+60F1+100F2=3280...10(226+6F1+10F2)=328.... 6F1+10F2=102...(i)........,, Now, 5+8+F1+20+F2+2=50.... F1+F2+35=50... F1+F2=15...(ii)...... By solving eqń (i) and (ii) you will get F1= 12 & F2=3

Anshika / U Can Call Me Alien ????? 6 years, 10 months ago

I think it would be median not mean

????? ??? 6 years, 10 months ago

Please

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