MTS 21 25-07-2022 Shift 2


Question 1

The average marks scored by 8 boys is 72. If the scores of three girls are also included, the average marks increases by
3. The average marks scored by the three girls is:

8 छात्रों दूठारा अर्जित औसत अंक 72 हैं। यदि तीन छात्राओं के अंकों को भी इसमें शामिल कर लिया जाता है, तो औसत अंकों में 3 की
वृद्धि हो जाती है। तीनों छात्राओं द्वारा अर्जित अंकों का औसत जात कीजिए।


Options

A

B

C

D


Solution:

Correct Answer:

A


Average marks of 8 boys = 72

Lets Average marks of 3 girls = x

Average marks of 8 boys and 3 girls = 72 + 3 = 75

Now we can say 

75 = 72×8+3x11\frac{72\times8+3x}{11}

3x = 825 - 576 = 249

x = 83

8 छात्रों  का औसत  = 72

माना की 3 छात्राओं का औसत   = x

8 छात्रों और  3 छात्राओं का औसत = 72 + 3 = 75

अब हम जानते है कि 

75 = 72×8+3x11\frac{72\times8+3x}{11}

3x = 825 - 576 = 249

x = 83

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