यदि निम्न बारम्बारता का औसत माध्य 27 हो तो p का मान ज्ञात कीजिए |
`{:("वर्ग:",0-10,10-20,20-30,30-40,40-50),("बारम्बारता ": ," "8," "p," "12," "13," "10):}`

Answer

p= 7