In an entrance exam, 3 marks is awarded for every correct answer and (-1) for every wrong answer. If a student gets 38 marks after attempting all questions, find the number of questions answered correctly if the total questions were 70.  Choose the correct choice from the following choices:
A) 27  B) 88  C) 26  D) 29  E) 71
Explanation:   Let x be the number of questions answered correctly. Hence, number of questions whose answer were wrong = (70 – x)   3*x + (70 – x)*(-1) = 38   4x = 38 + 70= 
<gadget id="calculator">38 + 70</gadget>
<output>108</output>
108   x= 27   27NSWER:27
<result>A</result>
In an entrance exam, 3 marks is awarded for every correct answer and (-1) for every wrong answer. If a student gets 38 marks after attempting all questions, find the number of questions answered correctly if the total questions were 70.