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The average age of boys to start showing interest in going to the gym is 12 years with a standard deviation of 1.2 years. Supposing

The average age of boys to start showing interest in going to the gym is 12 years with a standard deviation of 1.2 years. Supposing that the distribution is normal, what is the probability of a boyshowing interest in going to the gymthat is between 10 and 11 years?

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