Range of difference

is it I & II

Yes....OA = I and II.

Can you please tell how you solved the same ?

goelmohit2002 wrote:Yes....OA = I and II.

Can you please tell how you solved the same ?

the number with odd tenth digit can be in the following form x.1, x.3, x.5, x.7, x.9

now as per given condition, to calculate E-S each odd number will drop min -0.1 or max -0.9

such numbers are 20 nos. so total value of drop is min -0.1 X 20 i.e. -2 and max -0.9 X 20 i.e. -18

similarly, even nos can be in the following form x.2, x.4, x.6, x.8

these even numbers are 10.

for x.2 form gain is 0.8
for x.4 form gain is 0.6
for x.6 form gain is 0.4
for x.8 form gain is 0.2

so to calculate E-S due to even numbers, gain is min +0.2 X 10 i.e +2, max +0.8 X 10 i.e. +8

So the net gain in calculating (E-S) ranges from (-2)+(+8) i.e 6 to (-18)+(+2)i.e -16

so I & II are true.

real2008 wrote:

goelmohit2002 wrote:Yes....OA = I and II.

Can you please tell how you solved the same ?

the number with odd tenth digit can be in the following form x.1, x.3, x.5, x.7, x.9

now as per given condition, to calculate E-S each odd number will drop min -0.1 or max -0.9

such numbers are 20 nos. so total value of drop is min -0.1 X 20 i.e. -2 and max -0.9 X 20 i.e. -18

similarly, even nos can be in the following form x.2, x.4, x.6, x.8

these even numbers are 10.

for x.2 form gain is 0.8
for x.4 form gain is 0.6
for x.6 form gain is 0.4
for x.8 form gain is 0.2

so to calculate E-S due to even numbers, gain is min +0.2 X 10 i.e +2, max +0.8 X 10 i.e. +8

So the net gain in calculating (E-S) ranges from (-2)+(+8) i.e 6 to (-18)+(+2)i.e -16

so I & II are true.

Awesome real2008. Thanks a lot !!!