The mean of the following data is 50. Find the missing frequencies f1 and f2.

The mean of the following data is 50. Find the missing frequencies f1 and f2, if the sum of frequencies is 120.
class interval 0-20 20-40 40-60 60-80 80-100 total
frequency 17 f1 32 f2 19 120

link of ncert solutions of ex-14.1 Q1 to Q5 is:-

link of Ex-14.1 Q6 to Q9 is:-

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[indianlord]

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[saikatghosh]

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[RJ-piiu]

Thank you soo much Having exam tomorrow but I didn't know how to do this But u helped Ur explanation is really really simple.... Loved the class

[iv_]

thankyou sir, keep the good work up!🙂

[bharathraj]

thankyou sir you yeaching was nice i have learnt f1 and f2 in direct method

[rameshkharata]

Motivational mathematics full solution sir plz