Question 921424
You have 2 intersecting circles.One circle is
the number of soccer players. the other
circle is number of cricket players
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Anything outside the 2 circles is those
who play neither sport -that is {{{ 20 }}}
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{{{ 220 - 20 = 200 }}} 
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The {{{ 200 }}} represents:
(a) Those who ONLY play soccer
(b) Those who ONLY play cricket
(c) Those who play BOTH sports ( the intersection of circles )
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Let {{{ x }}} = the intersection of the circles
( those who play both sports )
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This is how many are in each category:
(a) {{{ 160 - x }}}
(b) {{{ 110 - x }}}
(c) {{{ x }}}
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Now I can say:
{{{ 160 - x + 110 - x + x = 200 }}}
{{{ 270 - x = 200 }}}
{{{ x = 70 }}}
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So the count in each category is:
(a) {{{ 160 - x = 90 }}}
(b) {{{ 110 - x = 40 }}}
(c) {{{ x = 70 }}}
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check:
{{{ 90 + 40 + 70 = 200 }}}
OK
Hope you can draw the diagram from this