$A$ student obtains $75\%$,$80\%$,and $85\%$ in three subjects. If the marks of a fourth subject are added,then his average cannot be less than.....$\%$
- A$60$
- B$65$
- C$80$
- D$90$
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Similar Questions
Find the mean of the following frequency distribution:
$x_i$ $3$ $6$ $9$ $12$ $f_i$ $1$ $2$ $3$ $4$
| $x_i$ | $3$ | $6$ | $9$ | $12$ |
| $f_i$ | $1$ | $2$ | $3$ | $4$ |
Medium
View SolutionThe median of a set of $9$ distinct observations is $20.5$. If the four largest observations of the set are increased by $2$,what will be the median of the new set?
Medium
View SolutionLet $x_1, x_2, \ldots, x_{11}$ be $11$ distinct positive integers. If we replace the largest of these integers by the median of the other $10$ integers,then:
DifficultKVPY 2019
View SolutionThe median of $21$ observations is $40$. If each observation greater than the median is increased by $6$,what will be the new median of the observations?
Easy
View SolutionThe relation between the median $M$,the second quartile ${Q_2}$,the fifth decile ${D_5}$,and the $50^{th}$ percentile ${P_{50}}$ of a set of observations is:
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