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Total weight of 20 students = 20 × 50 = 1,000 kg Including the teacher, new total weight = 21 × 51 = 1,071 kg Teacher’s weight = 1,071 - 1,000 = 71 kg Replacing the teacher with a 55 kg student: New total weight = 1,000 + 55 = 1,055 kg New average = 1,055 ÷ 21 = 50.24 kg Correct Option: a)
Who became the youngest female to conquer the highest peaks on all seven continents?
Match the columns:
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The book Poverty and Un-British Rule in India, which examines the economic impact of British colonialism, was written by:
Consider the following statements about nanotechnology:
1. It involves manipulating materials at the atomic and molecular scale.
2. Nanote...
