A coin is tossed two times whose outcomes are given as HH, TT, HH, TT. Find the number of incorrect entries.
2

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Solution

The correct option is A 2
On tossing a coin, we can get either a head or a tail.

So, let us say that the probability of getting a head or tail is called an event.

It is given that a coin is tossed 2 times. The sample will like:
HH, HT, TH, and TT

So, the number of incorrect entries is 2.

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Similar questions

Outcome:	Two heads (HH)	One head (HT or TH)	No head (TT)
Frequency:	105	275	120

Two coins are tossed 1000 times and the outcomes are recorded as given below:

$\begin{matrix} Number of heads & 2 & 1 & 0 Frequency & 200 & 550 & 250 \end{matrix}$

Now, it two coins are tossed at random, what is the probability of getting at most one head?

(a) $\frac{3}{4}$

(b) $\frac{4}{5}$

(d) $\frac{1}{5}$

Outcome:	Two heads (HH)	One head (HT or TH)	No head (TT)
Frequency:	105	275	120

If we toss a coin 4 times, what are the number of outcomes? Is it equal tossing 4 coins simultaneously? i.e. no. of outcomes=2⁴=16

And what if we toss a pair of coins two times? Is it also equal to tossing 4 coins simultaneously? i.e. no. of outcomes is 16?

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