Question

The following table gives the life penod of 400 neno bulbs (lamps) :
(Life time (in hour) - Number of bulbs)
400 — 500 - 10
500 — 600 - 56
600 — 700 - 60
700 — 800 - 80
800 — 900 - 74
900 — 1000 - 68
1000 — 1100 - 52

Draw the histogram for above data. How many bulbs have life time more than 800 hours ?

Answer 1

Answer:

194 neon bulbs have life time more than 800 hours.

Step-by-step explanation:

(Life time (in hour) - Number of bulbs)

400 — 500 ----------------10

500 — 600 ---------------- 56

600 — 700 ---------------- 60

700 — 800 ---------------- 80

800 — 900 -----------------74

900 — 1000 -------------- 68

1000 — 1100 ------------- 52

On x -axis: life time in hours is shown

On Y-axis: Number of neon lamps are shown

To calculate the number of bulbs having more than 800 hours,just add the values of last three classes

Bulbs having more than 800 hours:

=74+68+52

=194 bulbs

Hope it helps you.