Register

NIELIT 2019 Feb Scientist D - Section C: 21

• retagged by
2,576 views
0 0 votes

The average of $8$ readings is $24.3$, out of which the average of first two is $18.5$ and that of next three is $21.2$. If the sixth reading is $3$ less than seventh and $8$ less than eighth, what is the sixth reading ?

  1. $24.8$
  2. $26.5$
  3. $27.6$
  4. $29.4$

1 Answer

1 1 vote

Now, if 6th reading is x,

the x+x+3+x+8= 93.8

after solving,

x=27.6

Voting & Accepting an answer helps improve the community
← Previous · NIELIT 2019 Feb Scie...Next → · NIELIT 2019 Feb Scie...
← Previous in category · NIELIT 2019 Feb Scie...Next in category → · NIELIT 2019 Feb Scie...
Position:
Show:

Related questions

0 0 votes
1 answers 1 answer
2.6k
2.6k views
Lakshman Bhaiya asked Apr 3, 2020
2,620 views
NIELIT 2019 Feb Scientist D - Section D: 21
How many litres of a $3\%$ hydrogen peroxide solution should be mixed with $6$ liters of a $30\%$ hydrogen peroxide solution so as to get a mixture of $12\%$ solution ?$3...
0 0 votes
1 answers 1 answer
2.2k
2.2k views
Lakshman Bhaiya asked Apr 3, 2020
2,174 views
NIELIT 2019 Feb Scientist D - Section C: 1
The $L.C.M$ of $\left (x^{3}-x^{2}-2x \right)$ and $\left (x^{3}+x^{2} \right)$ is : $\left (x^{3}-x^{2}-2x \right)$$\left (x^{2}+x \right)$$\left (x^{4}-x^{3}-2x^{2} \ri...
0 0 votes
1 1 answer
2.5k
2.5k views
Lakshman Bhaiya asked Apr 3, 2020
2,487 views
NIELIT 2019 Feb Scientist D - Section C: 2
Ashok's age is $\left (\frac{1}{6} \right)^{th}$ of his father's age. The father's age will be twice of Kamal's age after $10$ years. If Kamal's eighth birthday was celeb...
1 1 vote
1 1 answer
1.9k
1.9k views
Lakshman Bhaiya asked Apr 3, 2020
1,851 views
NIELIT 2019 Feb Scientist D - Section C: 3
If $t^{2}-4t+1=0$, then the value of $\left[t^{3}+1/t^{3} \right]$ is :$44$$48$$52$$64$
0 0 votes
1 1 answer
2.1k
2.1k views
Lakshman Bhaiya asked Apr 3, 2020
2,137 views
NIELIT 2019 Feb Scientist D - Section C: 4
The difference between simple interest and compound interest on a sum for $2$ years at $8\%$, when the interest is compounded annually is ₹ $16$. If the interest were com...