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an absent minded doctor cannot remember how many patients are on his registar. records show that the ratio of male to females patients is 2:3 and the ratio of private to NHS patients is 2:5 . How many patients are on the registar,
chose from
a)60
b)63
c)70
the total number of patients must be divisible by 5 and by 7 ...
so its 70?
you tell me ... do you understand why?Quote:
Originally Posted by Tweety
yes, both ratio's have to be divisible by the same number
do you understand how I came up with 5 and 7?