(D) The total number of students is $50$.We need to find the probability that a student weighs $56 \ kg$ or more.Students weighing $56 \ kg$ or more f

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(D) The total number of students is $50$.We need to find the probability that a student weighs $56 \ kg$ or more.Students weighing $56 \ kg$ or more fall into the intervals $56-58$ and $58-60$.The number of students in the interval $56-58$ is $9$.The number of students in the interval $58-60$ is $6$.Total number of students weighing $56 \ kg$ or more = $9 + 6 = 15$.The probability $P$ is given by the formula: $P = \frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$.$P = \frac{15}{50} = \frac{3}{10} = 0.3$.Therefore,the probability is $0.3$.

Class 9 Mathematics Probability Mix Examples - Probability

Medium

The distribution of the weights of $50$ students in a class is as follows:
Weight (in $kg$) Number of students
$50-52$ $10$
$52-54$ $12$
$54-56$ $13$
$56-58$ $9$
$58-60$ $6$

Find the probability that a student selected at random weighs $56 \ kg$ or more.

A
$0.7$
B
$0.4$
C
$0.1$
D
$0.3$

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Mix Examples - Probability

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Medium

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Number of defective bulbs $0$ $1$ $2$ $3$ $4$ $5$ $6$ More than $6$

Frequency $400$ $180$ $48$ $41$ $18$ $8$ $3$ $2$

One carton was selected at random. What is the probability that it has defective bulbs from $2$ to $6$?

Medium

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$A$ recent survey found that the ages of workers in a factory is distributed as follows:

Age (in years) $20-29$ $30-39$ $40-49$ $50-59$ $60$ and above

Number of workers $38$ $27$ $86$ $46$ $3$

If a person is selected at random,find the probability that the person is under $40$ years.

Medium

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Three coins are tossed simultaneously $500$ times with the following frequencies of different outcomes:

Number of heads $0$ $1$ $2$ $3$

Frequency $70$ $190$ $175$ $65$

Find the probability of getting $0, 1, 2$ or $3$ heads.
Verify that the sum of all these probabilities is $1$.

Medium

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The probability of a month of August having $5$ Wednesdays is ............

Easy

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Weight (in $kg$)	Number of students
$50-52$	$10$
$52-54$	$12$
$54-56$	$13$
$56-58$	$9$
$58-60$	$6$

Number of defective bulbs	$0$	$1$	$2$	$3$	$4$	$5$	$6$	More than $6$
Frequency	$400$	$180$	$48$	$41$	$18$	$8$	$3$	$2$

Age (in years)	$20-29$	$30-39$	$40-49$	$50-59$	$60$ and above
Number of workers	$38$	$27$	$86$	$46$	$3$

The distribution of the weights of $50$ students in a class is as follows: Weight (in $kg$) Number of students$50-52$$10$$52-54$$12$$54-56$$13$$56-58$$9$$58-60$$6$Find the probability that a student selected at random weighs $56 \ kg$ or more.

Similar Questions

In a survey of $364$ children aged $19-36$ months,it was found that $91$ liked to eat potato chips. If a child is selected at random,the probability that he/she does not like to eat potato chips is:

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The distribution of the weights of $50$ students in a class is as follows:
Weight (in $kg$) Number of students
$50-52$ $10$
$52-54$ $12$
$54-56$ $13$
$56-58$ $9$
$58-60$ $6$

Find the probability that a student selected at random weighs $56 \ kg$ or more.

$A$ recent survey found that the ages of workers in a factory is distributed as follows:

Age (in years) $20-29$ $30-39$ $40-49$ $50-59$ $60$ and above

Number of workers $38$ $27$ $86$ $46$ $3$

If a person is selected at random,find the probability that the person is under $40$ years.

Three coins are tossed simultaneously $500$ times with the following frequencies of different outcomes:

Number of heads $0$ $1$ $2$ $3$

Frequency $70$ $190$ $175$ $65$

Find the probability of getting $0, 1, 2$ or $3$ heads.
Verify that the sum of all these probabilities is $1$.