Question
The average of six numbers is 8. When three new numbers
are included in such a way that the first number is twice the second and second number is thrice the third, now the average of nine numbers becomes 12. What will be the difference of first and third among the new numbers?Solution
Sum of five numbers = 6 × 8 = 48 Let the third number be x, Second number will be 3x, First number will be 6x According to the question, (48+6x+3x+x)/9=12 ; (48+10x)/9=12; x= (108-48)/10 x=6 ∴ the three numbers will be 6, 18 and 36 ∴ Difference of first and third no.= 36 – 6 = 30
A car accelerates from rest at a uniform rate of 2 m/s² for 10 s. What is the total distance traveled?
What is a fertiliser that supplies two or more than two primary nutrients called?
Which of the following statement is/are true?
I. Acids are sour in taste
II. Bases are bitter in taste
A series LCR circuit has a resistor of 100 Ω. At resonance, the voltage across the resistor is 50 V and across the inductor is 30 V. If the angular re...
Which exercise is positioned to be India's largest multinational air operation?
When hard water is evaporated completely, the white solid remains in the container. It may be due to the presence of
1. Carbonates of Ca and Mg
The correct option, if speeds of gamma rays, X-rays and microwave are Vg, Vx an Vm respectively will be
Two bodies are in SHM having the same amplitude but different frequencies. The motion of the resultant is:
What is the product of the reaction?
CH₃COOH + CH₃OH → (H⁺, heat)
Which of the following is Vitamin-E?
Relevant for Exams:
