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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Similar Questions

$1000$ families with $2$ children were selected randomly,and the following data were recorded:
Number of girls in a family $0$ $1$ $2$
Number of families $128$ $672$ $200$

Compute the probability of a family,chosen at random,having $(1)$ two girls,$(2)$ one girl.

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

$100$ seeds were selected at random from each of $5$ bags of seeds,and were kept under standardised conditions equally favourable to germination. After some days,the number of seeds which had germinated in each collection were counted and recorded as follows:
Bag $1, 2, 3, 4, 5$
Number of seeds germinated $76, 89, 65, 58, 85$

What is the probability of germination of:
$(1)$ more than $60$ seeds in a bag?
$(2)$ less than $60$ seeds in a bag?
$(3)$ more than $90$ seeds in a bag?

Over the past $200$ working days,the number of defective parts produced by a machine is given in the following table:
Number of defective parts $0$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$ $11$ $12$ $13$
Days $50$ $32$ $22$ $18$ $12$ $12$ $10$ $10$ $10$ $8$ $6$ $6$ $2$ $2$

Determine the probability that tomorrow's output will have not more than $5$ defective parts.

$A$ die is thrown $1000$ times and the outcomes were recorded as follows:
Outcome $1$ $2$ $3$ $4$ $5$ $6$
Frequency $180$ $150$ $160$ $170$ $150$ $190$

If the die is thrown once more,then the probability that it shows $5$ is:

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