Question

Find the value of x , if the mean of the following data is 14​

Answer 1

Answer:

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Step-by-step explanation:

Arithmetic Mean =∑fi∑xifi

⇒Arithmetic mean =7+k+8+4+5(5×7)+(10×k)+(15×8)+(20×4)+(25×5)

⇒arithmetic mean =7+k+8+4+535+10k+120+80+125=14

⇒336+14k=360+10k

⇒4k=24

⇒k=6