If the mean of the following data is 18. Find the missing frequency f. CLASS-10

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If the mean of the following data is 18. Find the missing frequency f.
Class 11-13 13-15 15-17 17-19 19-21 21-23 23-25
Frequency 7 6 9 13 f 5 4
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Thanks sir you are very helpful to me🙏🏻

Amanpreet-drawings
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"Thanks for all you do to provide a great education for completely free. I struggle on some topics in my maths class and i always get excited when i see you've done a vid on it. I appreciate it more than you know! keep up the fantastic work".

lakshminarayana
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Sir this video is very helpful and good explanation 👌👌sir uplode more videos it will be more helpful for class 10

ShaikShaeena-kskq
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Thanku for all u do to provide a great education for completely free .i appreciate it more than know keep it fantastic work👌👌

cook_with_anu
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Good explanation
Very helpful
thank you

fortnightgamer
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Why u not used assumed mean method



Sir I m trying this type of que by assume mean but I got wrong answer every time from this method pls help

asterixvines
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i never seen anyone explaining like this ty sir

kevin-dldg
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Didn't understood that 18f can you explain sir plzz ?

siddhipanchal
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Sir frequency hi kesy nikalty h smj nhi arha

shakirniazi