6 students wrote science exam. their average marks are 70. 5 students got 65, 75, 55, 72 and 69 marks respectively. therefore what is the marks of the sixth student? Pick:
A) 84
B) 68
C) 85
D) 75
E) 42
<gadget id="calculator">70 * 6</gadget>
<output>420</output>

<gadget id="calculator">65 + 75</gadget>
<output>140</output>

<gadget id="calculator">140 + 55</gadget>
<output>195</output>

<gadget id="calculator">195 + 72</gadget>
<output>267</output>

<gadget id="calculator">267 + 69</gadget>
<output>336</output>

<gadget id="calculator">420 - 336</gadget>
<output>84</output>

<result>A</result>
6 students wrote science exam. their average marks are 70. 5 students got 65, 75, 55, 72 and 69 marks respectively. therefore what is the marks of the sixth student?
subtract(multiply(70, 6), add(add(add(add(65, 75), 55), 72), 69))
explanation total marks of 5 students = ( 65 + 75 + 55 + 72 + 69 ) = 336 required marks = [ ( 70 x 6 ) – 336 ] = ( 420 – 336 ) = 84 answer a