Question

mean marks of salim in 5 subjects is 78 he got 76 ,78,80 and 77 marks respectively in english ,math, science,social science marks how many marks did salim get in hindi? 1)75 2)79 3)82 4) 84​

Answer 1

Answer:

answer is 79

Step-by-step explanation:

5 subjects average is 78 that means 78×5=380

remaining four subjects marks 76+78+80+77=301

hindi marks = 380-301=79

Answer 2

Salim got 79 marks in Hindi if Mean marks of Salim in 5 subjects is 78 and he got 76, 78, 80 and 77 marks respectively in English, Maths, Science, Social science marks

Given:

• Mean marks of Salim in 5 subjects is 78.
• Salim got 76, 78, 80 and 77 marks respectively in English, Maths , Science, Social science marks.

To Find:

• Salim marks in Hindi

Solution:

• $\text{Mean}=\dfrac{\text{sum of all the obervations}}{\text{number of the observations}}$

Step 1:

Calculate Total marks by multiplying mean marks with number of subjects.

Total Marks in 5 Subjects = 78 x 5

=> Total Marks in 5 Subjects = 390

Step 2:

Add Marks of  English, Maths , Science, Social science  subjects

Total Marks in 4 Subjects = 76 + 78 + 80 + 77

Total Marks in 4 Subjects = 311

Step 3:

Subtract Marks in 4 subjects ( except Hindi) from Marks in 5 subjects to get marks in Hindi

390 - 311

= 79

Hence,  Salim got 79 marks in Hindi

Correct option is 2) 79