Question
The average score of 70
candidates in the SBI PO exam is 40. If the candidates who passed have an average score of 49, while those who failed have an average score of 35, determine the ratio of the number of candidates who passed to the number of those who failed in the SBI PO exam.Solution
ATQ, Total scores = 70×40 = 2800 Let the number of passed and failed aspirants in the SBI PO exam be 'p' and (70-p) respectively. 2800 = p×49+ (70-p)×35 2800 = 49p+70×35-35p 2800-2450 = 14p p = 350/14 = 25 The number of failed aspirants = 70-25 = 45 Required ratio = 25:45 = 5:9
If p = 24 - q - r and pq + r(q + p) = 132, then find the value of (p² + q² + r²).
((99.9 - 20.9)² + (99.9 + 20.9)² )/(99.9 x 99.9 + 20.9 x 20.9) = ?
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Find the value of the given expression-
(4x+4 -5× 4x+2) / 15×4x – 22×4x
If 4x² + y² = 40 and x y = 6, then find the value
of 2x + y?
If p = 40 - q - r and pq + r(q + p) = 432, then find the value of (p² + q² + r²).
47.98 × 4.16 + √325 × 12.91 + ? = 79.93 × 5.91
If x + y = 4 and (1/x) + (1/y) = 24/7, then the value of (x3 + y3).
- If p = 20 - q - r and pq + r(p + q) = 154, then find the value of (p² + q² + r²).
If a = (√2 - 1)1/3, then the value of (a-1/a)3 +3(a-1/a) is:
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