Question

66 B
Section 1 - B
1) Anil can do a piece of work in 16 days which Shashi can
finish in 24 days. If they work on alternate days with Anil
starting, in how many days the work will be finished?
A) 15 days
B) 17 days
C) 18 days
D) 19 days
2) Three identical discs have one side painted in blue color
and the other in green color. These three discs are tossed
simultaneously. What is the probability of getting more blue
Faces than the green faces, when tossed?
A) 3/4
3) 1/4
C) 1/2
2) 1/3
A circle is inscribed in an equilateral triangle of sid
cm, touching its sides. What is the area of the circle?
) 50TT cm2​

Answer 1

Answer:

19.2 days, 1/4

Step-by-step explanation:

1. Anil can do work in 16 days. So in 1 day, Anil will do 1/16 work.

Similarly Shashi can do work in 24days. So in 1day, Shashi will do 1/24 work.

Suppose two days have passed and they worked alternatively in two days.

Work completed in these two days = 1/16 + 1/24

= 5/48

Average work in 1 day = 5/48/2 = 5/96

So days required to finish work = 96/5=19.2

So option D

2. Three discs are present. After tossed, only one side would be visible. So there will be 3 sides of 3 discs visible. These can be green or blue.

More blue means atleast 2 sides should be blue.

Number of possibilities are : Either all sides blue or either all sides green or either two sides green and 1 side blue or either one side green and two sides blue ( this is favoured possibility)

So probablity = Number of favourable condition/total possibility

= 1/4

3. This question has insufficient data.