These are 6 iron - plates marked as 1,2,3,4,5,6 one of the is to taken out without seeing them. Find the probability of a plate, marked 3 is taken out.
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Answered by
2
Answer:
Bag I= 3 White + 7 Red + 15 Black
Bag II= 10 White + 6 Red + 9 Black
Each beg contains total of 25 balls.
There are three cases for selection of a particular ball :
1. White ball from Bag I and Bag II=
25
3
×
25
10
2. Red ball from Bag I and Bag II=
25
7
×
25
6
3. Black ball from Bag I and Bag II=
25
15
×
25
9
∴ Total probability =
625
30
+
625
42
+
25
135
=
625
207
.
Hence, the answer is
625
207
HOPE IT HELP YOU!
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6
a lots of thanks for you.
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