MCQ
Two coins are tossed once. The probability of getting two tails is:
- A$\frac{1}{2}$
- ✓$\frac{1}{4}$
- C$\frac{1}{6}$
- D$\frac{1}{8}$
✓
Answer
Correct option: B.
$\frac{1}{4}$
(b) $\frac{1}{4}$
Explanation:
Given, $n(S)=\{ HH , HT , TH , TT \}=4$
and $n( E )=\{ TT \}=1$
Now, $P(E)=\frac{n(F)}{n(S)}=\frac{1}{4}$.
Explanation:
Given, $n(S)=\{ HH , HT , TH , TT \}=4$
and $n( E )=\{ TT \}=1$
Now, $P(E)=\frac{n(F)}{n(S)}=\frac{1}{4}$.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A fruit box contains 120 apples. Out of these, 30 apples are rotten. The probability that the apple drawn is not rotten while an apple is drawn at random is:
In the figure, if $\frac{\mathrm{AO}}{\mathrm{OC}}=\frac{\mathrm{BO}}{\mathrm{OD}}=\frac{1}{2}$ and $\mathrm{AB}=5 \mathrm{~cm}$, then the value of DC is :
→For the equation $3 x^2-4 x-2=0$, the roots are :
→$\frac{\sin A-2 \sin ^3 A}{2 \cos ^3 A-\cos A}$ is equal to :
→A retailer purchases a fan for ₹ 1200 from a wholesaler and sells it to a consumer at a $15 \%$ profit. If the rate of sales tax (under VAT) at every stage is $8 \%$, then choose the correct answer from the given four options
The selling price of the fan by the retailer (excluding tax) is
→The selling price of the fan by the retailer (excluding tax) is
$\sec \theta(1-\sin \theta)(\sec \theta+\tan \theta)=$
→Sejal has a recurring deposit account in a bank and deposits 100 per month for 20 months, then the rate of interest paid by the bank if the maturity value of account is 2,175 is:
In the figure, AT is a tangent to the circle with centre O such that $\mathrm{OT}=4 \mathrm{~cm}$ and $\angle \mathrm{OTA}=30^{\circ}$. The length of AT is :
→A retailer marked up the price of his goods by 20% above the list price and offers two successive discounts of 10% and 5% on the marked price. If the rate of GST is 18% and a consumer pays CGST of 4,617, then the listed price of the goods is:
1. The interest on the recurring deposit account can be calculated by using formula:
$I=\frac{n(n+1)}{2 \times 12} \times P \times \frac{r}{100}$
where I is the interest, P is the money deposited per month, n is the number of months for which the money has been deposited and r is the rate of interest per annum.
2. The Maturity value on a recurring deposit
$MV=P \times n^2+P \times n+I$
where, MV = Maturity value, $P =$ money deposited per month, $n=$ number of months, $I =$ interest
→$I=\frac{n(n+1)}{2 \times 12} \times P \times \frac{r}{100}$
where I is the interest, P is the money deposited per month, n is the number of months for which the money has been deposited and r is the rate of interest per annum.
2. The Maturity value on a recurring deposit
$MV=P \times n^2+P \times n+I$
where, MV = Maturity value, $P =$ money deposited per month, $n=$ number of months, $I =$ interest