Mam plz finish the question first, so that we can also try solving that, in midst u start solving that doesn’t give us chance to try solving.. Plz consider as request

Isn’t the answer should be 280 rather than 300… Bcz 9 groups of 20=180 And the one excluded group(500to600) of 100 numbers Total180+100=280 Plz correct me

180+100 (u understood) now, U have 5 as unit digits between 500 to 600 -10 times and 5 at tens place between 500 to 600- 10 times..so total times digit 5 used is…180+100+20=300

Divya yadavsays:1-if(c-a=2 then can c=2a??

ANUPAM RAIsays:yes I have also the same doubt. c should be (2+a)?

12 3says:If C-a=2, Then as “a” will change its sign from negative to positive while going to other side, so c=2+a not 2a.

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PLEASE SHARE THE QUESTIONS PDF IF POSSIBLE.

Divya yadavsays:plz see at 26:20

12 3says:again if u interchange the tens and unit digits the no. remain same i.e. 411, so same number can not be counted two times.

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Indu Dahiyasays:Mam plz finish the question first, so that we can also try solving that, in midst u start solving that doesn’t give us chance to try solving.. Plz consider as request

Anjali agarwalsays:Mam please question ka pdf send kijiye kre

. Bhot problm hoti h

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KANCHAN DOHERAYsays:Thank you ma’am for clearing my doubt

Vasu3564says:Isn’t the answer should be 280 rather than 300…

Bcz 9 groups of 20=180

And the one excluded group(500to600) of 100 numbers

Total180+100=280

Plz correct me

12 3says:180+100 (u understood) now, U have 5 as unit digits between 500 to 600 -10 times and 5 at tens place between 500 to 600- 10 times..so total times digit 5 used is…180+100+20=300