Identify and explain the concepts from the given illustrations:
Vedant gets his student scholarship directly in his a/c linked with Aadhar.
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A cell at telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at t
Correct Answer - A Polyploid cells have a chromosome number that is more than double the haploid number, e.g. Triticum aestivum (wheat) is a hexaploid (6n).
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A man alternately tosses a coin and throws a die beginning with the coin. The probability that he gets a head in the coin before he gets a 5 or 6 in t
Correct Answer - A The probability of getting a head in a single toss of a coin is P = 1/2 (say). The probability of getting 5 or 6 in a...
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A coin is tossed `2n` times. The chance that the number of times one gets head is not equal to the number of times one gets tails is `((2n !))/((n !)^
Correct Answer - C The required probability is 1- probability of getting equal number of heads and tails `=1-""^(2n)C_(n)((1)/(2))^(n)((1)/(2))^(2n-n)` `=1-((2n)!)/((n!)^(2))xx(1)/(4^(n))`
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In a class of 10 student, probability of exactly I students passing an examination is directly proportional to `i^(2).` Then answer the following ques
Correct Answer - B Let P(i) be the probability that exactly I students are passing an examination. Now given that `P(A_(i))=lamda_(i)^(2)(where lamda"is constant")` `impliesunderset(i-1)overset(10)sumP(A_(i))=underset(i-1)overset(10)sum lamdai^(2)=lamda(10xx11xx21)/(6)=lamdaxx386=1` `implieslamda =1//358=5//77.` Let A reprsent the...
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The number of ways of distributing `3` identical physics books and `3` identical methematics books among three students such that each student gets at
Correct Answer - B `(b)` `n(A)=^(3+2-1)C_(2-1)xx^(3+2-1)C_(2-1)=16` `n(B)=n(C )=16` `n(AnnB)=^(3+2-1)C_(1-1)xx^(3+2-1)C_(1-1)` `=1=n(BnnC)=n(AnnC)` `n(AnnBnnC)=0` Required no. of ways `=100-(16+16+16-1-1-1+0)=55`
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A man throws a die until he gets a number greater than `3`. The probability that he gets `5` in the last throw
Correct Answer - A `(a)` At event `A` he gets a number greater than `3` `:.P(A)=1//2` At event `B` he gets `5` in last throw `:.P(B)=1//6` `:.` Required probability is `P(E)=(1)/(6)+(1)/(2)*(1)/(6)+(1)/(2)*(1)/(2)*(1)/(6)+…..oo`...
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A student with defective eye-sight cannot see clearly anything that is father from his eyes than 50 cm. What kind of lens would enable him to see dist
Correct Answer - Concave lens, power =`-2D`
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Ranvir gets `8%` per annum, on his investment made in buying Rs.80 shares of a company for Rs.100 each. What is the rate of dividend, and what is his
Correct Answer - `10%`; Rs.4000
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An astronaut accidentally gets separated out of his small spaceship accelerating in inter stellar space at a constant rate of 100 m s^-2.
1. Assuming absence of stars in the vicinity, the only gravitational force exerted on astronaut is by the spaceship. 2. But this force is negligible. 3. Hence, once astronaut is out of...
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A merchant gets a profit of 20% by allowing a discount of 10%.Instead, if he allows a discount of 15%, then what would be his loss or profit percentag
Correct Answer - `13(1)/(3)%`
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