Question

the mean age of nine members of a club is 20 years. when another person joins the club, the mean age increases to 21 years. how old is the new person?​

Answer 1

Answer:

Nervous tissue is found in the brain, spinal cord, and nerves. It is responsible for coordinating and controlling many body activities. It stimulates muscle contraction, creates an awareness of the environment, and plays a major role in emotions, memory, and reasoning.

Step-by-step explanation:

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Answer 2

Answer:

30years

Step-by-step explanation:

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