Question

6. Ranjana had a piggy bank and she wanted to use her savings to buy a gift for her grandmother.
She found some 10 Rs. Notes and some 50 Rs. Notes in her piggy bank. She found that the number
of 50 Rs notes was one less than the number of 10 Rs notes. The total value of the savings in the
piggy bank was Rs. 550. Find the number of 50 Rs. Notes and 10 Rs. Notes

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Answer 1

Answer:

She bought:

10 rupee cards: x

5 rupee cards: 2/3 x

15 rupee cards:1/5 x

So the equation is

10x + 5*(2/3 x) + 15(1/5 x) = 245

So

x = 15

So

She bought:

10 rupee cards: 15

5 rupee cards: 10

15 rupee cards:3

Answer 2

Step-by-step explanation:

Given equation is: x2−5x+6=0

Here, a+b=5;ab=6

a2−b2=(a+b)(a−b)

=(a+b)(a+b)2−4ab

=5.52−4×6

=5.(±1)=±5