Rajesh went to a shop to purchase erasers. He bought 8 triangular shape erasers of which 3 are g...

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Rajesh went to a shop to purchase erasers.
He bought 8 triangular shape erasers of which 3 are grey and rest are black, and 10 square shape erasers of which 6 are grey and rest are black. One of his eraser lost at random.
How many triangular erasers are of Grey colour and how many squares are of black colour?
a. 3,4
b. 4,5
c. 5,5
d. 8,6
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