The average of five positive number is 148 the average of the first two and last two numbers are 136 and 148 respectively what is the third number
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Answer:
172
Step-by-step explanation:
Let the numbers be a,b,c,d,e.
(a+b)/2 = 136 or a+b = 272
(d+e)/2 = 148 or d+e = 296
Also (a+b+c+d+e)/5 = 148 or a+b+c+d+e = 740
Replacing values of a+b and d+e we get
272 + c + 296 = 740
c = 740-272-296 = 172
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