A wall of length 5 m and width 3 m is fitted with a window of length 1.5 m and width 1 m. Find the cost of painting the wall excluding the window at the rate of ₹50 per m2.
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Answer:
Total number of discs = x+8
Let A be the event of drawing a blue disc.
Since odd against drawing a blue disc is 2:5. ie 2/5.
P(A') = 2/5 => 1-p(A) =2/5. => P(A) = 1– 2/5 = 3/5.
But P(A) = x/(x+8)= 3/5 => x/(x+8) = 3/5
=> 5x = 3x+ 24 => 2x= 24 => x = 24/2 = 12
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Answered by
1
Answer:
Total number of discs = x+8
Let A be the event of drawing a blue disc.
Since odd against drawing a blue disc is 2:5. ie 2/5.
P(A') = 2/5 => 1-p(A) =2/5. => P(A) = 1– 2/5 = 3/5.
But P(A) = x/(x+8)= 3/5 => x/(x+8) = 3/5
=> 5x = 3x+ 24 => 2x= 24 => x = 24/2 = 12
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