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A piggy bank contains fifty ₹1 coins, hundred ₹2 coins and one hundred and fifty ₹5 coins. If it is equally likely any one of the coins will fall out when the bank is turned upside down, find the probability that ₹2 coin has not fallen out, when the bank is turned upside down.
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No. of ₹2 coins $= 100$
Total no. of coins $= 50 + 100 + 150 = 300$
$\therefore P(\text{not getting a \text{Rs} 2 coin}) = \frac{200}{300} = \frac{2}{3}$
Total no. of coins $= 50 + 100 + 150 = 300$
$\therefore P(\text{not getting a \text{Rs} 2 coin}) = \frac{200}{300} = \frac{2}{3}$