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# Easy random math

+10
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SHOW ALL WORKING OR YOUR ANSWER WILL BE WRONG BECAUSE I SAID SO.

Rice is sold in 75-gram packs and 120-gram packs.

The masses of both packs are given correctly to the nearest gramme.

Calculate the lower bound for the difference in mass between the two packs.

Feb 11, 2017

#3
+25978
+5

Agreed,,,I guess the question needs to specify what limits of rounding are  ( you could go to 75.499999999999999...) and what practical weight measurements are available in manufacturing and packaging !    I felt 100mg was 'practical'    LOL

Feb 11, 2017

#1
+25978
+4

75 grams can be UP to 75.4   or as LOW as 74.5   and still be rounded to 75 gm

120                      UP to 120.4          LOW as 119.5                                      120

120.4  - 74.5 = max diff = 45.9

MIN diff = 119.5 - 75.4 =  44.1 gm

Feb 11, 2017
#2
+110154
+5

EP    I think the bottom one should go up to  75.4999999 = 75.5

Rice is sold in 75-gram packs and 120-gram packs.

74.5  to  75.5                               119.5 to 120.5

lowest possible difference = 119.5 - 75.5 = 120-75-1 = 44g

Feb 11, 2017
#3
+25978
+5