Question
Venu has as many sisters as he has brothers. If Karuna, Venu’s sister has thrice as many brothers as she has sisters, then Venu has how many sisters?
Hint:
let no. of sisters for venu be x
By condition no. of brothers of venu is also x
If Karuna, Venu’s sister has thrice as many brothers as she has sisters
Find no. of karuna’s brothers and no. of karuna’s sisters and equate them as per above condition.
The correct answer is: 2 sisters
Ans :- Venu has 2 sisters
Explanation :-
let no. of sisters for venu be x
By condition no. of brothers of venu is also x
Step 1:-Find no. of karuna’s brothers and no. of karuna’s sisters
No. of sisters of karuna is no. of sister of venu except herself
No. of karunas sisters = no. of sister for venu - 1 = x -1
No. of brothers of karuna are no. of brothers of venu including venu.
No. of brothers of karuna = x + 1
Step 2:-equate the condition
If Karuna, Venu’s sister has thrice as many brothers as she has sisters
Now ,
∴venu has 2 sisters.
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