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Maths Puzzle
The sequences x1,x2 ... and y1,y2 … are in arithmetic progressions such that x1+y1=100 and x22−x21=y99−y100. Find the sum of the first 100 terms of the progression,(x1+y1),(x2+y2) ?
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self Other Question
How many kgs of Basmati rice costing Rs.42/kg should a shopkeeper mix with 25 kgs of ordinary rice costing Rs.24 per kg so that he makes a profit of 25% on selling the mixture at Rs.40/kg
The total age of some 7 years old and some 5 years old children is 60 years. If I have to select a team from these children such that their total age is 48 years, In how many ways can it be done?
A.
3
B.
2
C.
1
D.
4