Question

The marks obtained by a student of Class X in first and second unit test are 35 and 21 respectively Find the minimum marks he should get in the annual examination to have an average of at least 30 marks

• A. $x\le 34$
• B. $x\ge 34$
• C. $x>34$
• D. $x<34$

Answer 1

Answer: (B)

$x\ge 34$

Let the marks in the annual examination be $x$
Since, Average should be atleast $30$ marks,
$Average\ge 30$
$=>\frac{35+21+x}{3}\ge 30$
$=>56+x\ge 90$
$=>x\ge 34$