6.5 is suppose to be on the inside of the radical sign.
Q57) if 1/4 of a packet cover 1/5 then using a packet is using 4* 1/4 of it. This means that 4*1/5 of the garden would be covered which = 4/5.
q58) the total is 24 and 9 of them are boys. Therefore it follows that 9/24 of them are boys and so thats the probability of choosing a boy at random.
well 7-6 is one then you'll find common demonstrators with the fractions then simplify them then subtract them to get 1 1/4
To get the answer, you divide 2540 by 25, which gets you 101.6. Then, you would multiply 101.6 by 23 to get your answer, which is 2336.8.