TCS Company Logical Reasoning Logical Sequences

Eesha invited 8 friends to her birthday party - Usha, Nisha, Aasha, Abilasha, Suresh, Ramesh, Naresh, Ritesh. They all arrived one after the other around the party time within 1 minute of each other - from 19:41 to 19:48 hours, one friend every minute.

-Nisha joined the party before Naresh
-Suresh joined the part before Abilasha
-Naresh and Abilasha joined the party before Usha
-Naresh joined the party before Ritesh
-Abilasha joined the party before Ramesh
-Usha joined the party before Aasha

Which one of the following CANNOT be true?

Read Solution (Total 12)

TCS Other Question

Three dice are rolled, how many ways are there such that the total sum is 13 ? The number of times 2 occurs in 1000 to 9999.
I came across two methods.
Total 4 digit numbers that we can form is (9*10*10*10)
Total 4 digit numbers that we can form with out 2 is (8*9*9*9)
so 4 digit nos with 2 we can form (9*10*10*10)-(8*9*9*9) = 3168

OR

Number of 2's at units place(1000 to 9999)=900
Number of 2's at tenths place(1000 to 9999)=900
Number of 2's at hundreds place(1000 to 9999)=900
Number of 2's at thousands place(1000 to 9999)=1000

therefore total number of 2's =(900+900+900+1000)=3700

Which is the right method?