2.2 Study the sitting plan of a school hall below and answer the questions that follow. FIRE EXIT BALCONY 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 FIRE EXIT FIRE EXUT TIERED SEATING S == -- 7-2 STALLS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 FIRE EXIT STAGE 2.2.1 Determine the total number of seats in this school hall. (3) 2.2.2 How many rows are behind G7? (2)​

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Need solving this second acceleration problem.

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.