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The East West Social Survey organization surveyed respondents from Tariq road Shops. The weekly income of the respondents follows normal distribution with its mean income

The East West Social Survey organization surveyed respondents from Tariq road Shops. The weekly income of the respondents follows normal distribution with its mean income Rs. 10,000 and standard deviation Rs. 2,000 respectively

a) What is probability that the weekly income is less than Rs. 11,000?

b) What is probability that the weekly income is more than Rs. 12,000?

c) What is probability that the weekly income between Rs 7,000 and Rs. 11,200?

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